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Old 02-07-2004, 10:46 PM   #1
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Can I use a 91 crown vic 351 for 408 build?

I have access to a 91 crown vic 351 complete, are these roller motors?
What would have to be done to it to accept a roller setup/cam/lifters/spider, etc?
Is the balancer and flexplate 28oz balance?
Can I use the distributor and all the accessory brackets from it for a 408 build to go in a fox body?
I have been doing the searches on swaps, but any help someone can give me is much appreciated!
Thank you, Sam
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Old 02-08-2004, 02:32 AM   #2
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Not a roller. Roller 351s did not come out until 94.
Reduced base circle cam with stock Ford roller parts or stock roller cam with expensive tie down lifters.
28oz balance from the factory, don't know the balance of your 408 kit.
Distributor would have a cast iron gear compatible with flat tappet cams. Front accesories are std rotation water pump and have 2 ribbed belts instead of 1.
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Old 02-08-2004, 08:30 AM   #3
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You sure its out of a crown vic,I never heard or seen one with a 351 before.
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Old 02-08-2004, 09:28 AM   #4
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Tommy, is this worth buying and converting?($100 complete) or should I keep looking for a truck motor from a 94+?
I could use distributor if I change the gear?
what do you mean 2 belts? I have not seen this motor yet..

Thanks again! Sam

I too didnt think that some crown vics came with 351's in the early 90's...
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Old 02-08-2004, 09:55 AM   #5
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I don't think the Crown Vics came with a 351 for public consumption in the US. You sure that's what it's out of? If it's out of a Crown Vic, I'd bet it's a 302. If it's a 351, it's probably out of a truck.
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Old 02-08-2004, 10:03 AM   #6
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edmunds.com shows an optional 5.8 engine for the '91 Crown Vic "S sedan". I'm guessing "S" means "special". Cop car?

Ed
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Old 02-08-2004, 10:23 AM   #7
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It is out of a cop car, those are the only ones with the 351's I think.
Is this worth buying or should I keep looking?

EDBO what times/mph do you run with yours?

Thanks! Sam
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Old 02-08-2004, 11:14 AM   #8
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Quote:
Originally posted by HRSEPLA91
I could use distributor if I change the gear?
Sam,
Yea, you can put the correct gear on the distributor and it will work fine. It depends on your budget if you should use this or not. If you on a low buget i'd really consider this because it will have all the odd and end parts that may be a pita to find. If it is worth it or not I would consider this: what 351 specific parts can you use ? so far we have the block and the dizzy. what about the oil pan? If you could use those 3 things it would be worth it. you might be able to sell off the parts you don't need/can't and make you money back
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Old 02-08-2004, 11:15 AM   #9
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Is it worth buying? $100 is cheap for all the parts you'll get. You won't use the rotating assy but all the "little" stuff will bust your budget if you have to piece it all together.
You goin' carb or EFI? The EFI dist won't work with a carb.

My 393 is in a Cobra (no top, heater or windows) so it's sitting in the shop for the winter. I'm changing parts and sorting it out from construction right now, so I can't give you any perf numbers yet.

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Old 02-08-2004, 11:51 AM   #10
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My last car was a 91 crown vic 351w. It was a retired police car. Boy did it like gas 9-10 mpg. it had 2 serpetine belts with the standard rotation water pump. I had the intake off when I first got it but I cant remember what the valley looked like. I would say it was a non roller motor. the oil pan on mine was a double sump.

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Old 02-08-2004, 01:52 PM   #11
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My 408 was built from a 91 police crown vic 351. I only used the block and then transfered all my old 302 parts over. I picked up a distributer for a lightning at autozone and ran a small base circle cam. If I were to do the same thing today, I'd run a standard cam and use the tied lifters for the conversion. I didn't use the oilpan even though I could have, I opted for the 7qt Canton pan.
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Old 02-08-2004, 03:21 PM   #12
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Rick - was it a roller block?
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Old 02-08-2004, 04:34 PM   #13
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Quote:
Originally posted by EDBO
edmunds.com shows an optional 5.8 engine for the '91 Crown Vic "S sedan". I'm guessing "S" means "special". Cop car?

Ed
Correct, the S is the fleet/police model that came with a 351 putting out around 180hp.
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Old 02-08-2004, 06:25 PM   #14
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No Mike its not a roller block. The roller 351's didn't come out untill 94 If I'm not mistaken. There's a salvage yr here in Ohio that has several of them, I'm thinking about getting another if I cant find an early model soon.
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Old 02-08-2004, 06:25 PM   #15
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Was it a roller block Ed?
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Old 02-08-2004, 06:31 PM   #16
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Quote:
Originally posted by 88CrownVic302
Correct, the S is the fleet/police model that came with a 351 putting out around 180hp.

man, I remember when 170-190 hp was a lot for a stock motor. I'm glad those days are gone.
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Old 02-08-2004, 06:32 PM   #17
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Exclamation

Actually IMO, I dont think its such a big deal to find a roller block now that its so easy to do the conversion with the tied roller lifters. More than likely you'd be replacing the 100k+ lifters that are in your motor for some new ones, so you might as well get a better lifter that lets you run a standard cam without having to drill and tap for the spyder/lifter keys. By the time you subtract the additional machine work to have the block converted, your right around the same cost as buying the lifters anyway. Atleast thats the way I look at it. Also, there seems to be some trble associated with the small base circle cams that are out there.
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Old 02-08-2004, 06:54 PM   #18
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i once came very close to getting a 351 from a early 90s crown vic. i talked to a engine builder at the time and i think he qouted me something like $900 to convert it to a hydraulic roller and a complete rebuild. i would have gone ahead with all that but i didnt end up with the motor.

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Old 02-09-2004, 12:04 AM   #19
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I have a 351W from an 87 Crown Vic.

I am not sure what your intentions are for the 408, but for $100 I think it would be a decent deal. Here is what I am planning for my motor when funds become available:

3.85 cast stroker crank
Eagle I beam 351W rods
aftermarket pistons to keep the compression sensible
hydraulic flat tappet cam
recurved stock Duraspark distributor
stock replacement timing chain
pro topline cast iron heads
stealth intake
750 cfm carb
long tube 351W swap headers

Nothing too radical. Trying to maximize bang for the buck and maintain streetability. When I build the motor I plan to reuse the following parts:
Block, main bolts, timing cover, fuel pump eccentric, distributor, head bolts, oil pan and dipstick, intake bolts. I think those parts are worth $100. The swap pan, pickup, and dipstick sell for over $100 new.
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