I went with the vic jr because I thought it was a step above an air gap. I read some threads where the users got good results with them on a 363 and some 347sThere is no way an ootb Vic. Jr. intake designed for a 302 is not holding back a 363. Since you cannot go to a taller intake, have the Vic. Jr. fully ported and try some more timing on the dyno next time. I have never seen anyone recommend an ootb Vic. Jr. intake for a 363.
Dyno isn't stingy. My 302 with performer heads b303cam and cobra intake made 267whp 287wtq on the same dyno. This motor made 328 for torque. It's a dyno jetCan't assume a % loss. Maybe stingy dyno. If I where the op. I be asking the dyno guy about other stuff he has ran to compare it to. Or get a mph at the track..
How do I find map pressure and total fuel usage?It would be interesting to see what your MAP pressure was at peak hp, this would let you know if you have an inlet restriction. You also want to know what your total fuel usage is at peak hp, this would give you a ball park estimate on your driveline loss. You gave cam duration, but I’d venture to say you’re lift is gotta be close or over .600 to feed your heads. Nothing stopping you from cranking up your timing a few degrees and taking a spin to see if there’s a difference.