Rick has another 1968 Firebird that runs Pure Stock. It's went 11.30's over 120mph, that is very impressive considering the rules are much tighter than FAST.
For FAST, the engine must "appear stock", and all related components must have the correct factory part numbers for the engine that was used in the car the year it was produced.
So they MUST use a 1968 factory intake manifold, but it could be modified where you can't see any of the work.
I have a "modified" cast iron and an 1971 HO intake that I use on my own engines. They are excellent, and back to back tested against an Edelbrock Performer RPM my iron one outran it by 6hp!
That was on a 428 (434) engine build, 10.6 to 1 compression, KRE 260cfm "D" port heads, and custom HR camshaft. That engine made 491hp with the RPM intake, and 497HP with the iron intake, back to back pulls, same carb, and no other changes anyplace.
Dave at SD Performance has a CNC scan of my iron intake, and modifies quite a few of them based on that pattern........Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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