I've got a '72 Block 351w thats gonna be a 408 for my coupe.Similar to your combo with exception of a Hydraulic roller for nitrous,about 10.75 to 1 compression and some afr's.My last little 308 with a 150 shot went 10.40 on pump gas through the muffs,so the 408 with a 250 shot should put me in the high 9 range.
Your combo sounds about right for a mostly race motor.Should scream!.Just remember 3 inch mains dont like rpm in the phord motors... :wink:
My old stang..@3150
