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First off this combo is in my 95 Lightning but same priciples I guess.I just installed a 383 and a 76 mm in her.I have been driving her in a normal fashion until I get tuned.Right now I have the 30lb. injectors in it with a matching pro m 3" blow thru tube.Overall the truck drives great.I have only stepped on it a very little bit.What I'm experiencing is that sometimes, especially under a load like going up a hill.Under very little throttle the a/f will dip from a cruising 12.6- 12.8 down through the 10's into a low nine.The check engine light will come on momentarily also.I realize it has not been tuned and I will be installing the 60's and matching meter, but this is happening under no boost and very little throttle.Doesn't seem right.
 
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