Join Date: Jan 2015
Location: Injun Territory, 'Merica!
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In the Pure Stocks ranks, there is a fellow by the name of Jody Traylor(sp). posts on PY board, threefifdee, and on v8buick Pure Stock forums. Campaigned a '74 GTO into the high 13's and a '68 Firebird 350 HO. Jody's currently finishing up a '72 HO GTO for Pure Stock drags. Jody would be a great resource to contact on helping get a relatively stock '74 GTO to really get up and go.
Not sure if you are aquainted with Pure Stock build rules, the cars are run at the races on repro bias ply or radials in specific sizes. The engine rules do not allow major deviations, though CR is allowed a deviation of being raised 1.5 points. engine builds often mirror to a degree what an owner would do in building for NHRA stock class. there is no adding other cyl heads, porting, gasket matching, have to run the ex manifolds the vehicle was equipped with. Pontiac engine builds with optimized 066, 067, 068, 744 cams are limited to gross valve lift at the rocker of .424. Cams often times are not totally stock out the box Melling replacements, but are ground on different centerlines.
Exhaust systems.. In all the stock tire class muscle car racing classes going back to when the NMCA had their first stock muscle car clases, one of the largest contributor to lowering ET's has been a strong flowing "scienced out" exhaust system. Mandrel bent 2 1/2" headpipes, x pipe crossovers were first introduced in the Buick racer camp, then Torque Tech, and finally PYPES, and RARE systems. 2 1/2" head pipes with mandrel bends followed by a freeflowing muffler(s) and tailpipes also utilizing mandrel bends are today, the NORM. Its quite common to knock off 3/4 to near a full second off 1/4 mile times through a properly built exhaust system. Local muffler shop bent, or ordered head pipes with a kink at the down tube, flat spots, and more kinks going back, combined with poor flowing mufflers, all restrict exhaust flow. If I was serious about building a Pontiac X body like the '74 GTO, would look into alternatives to adding 45 lbs of weight with the long branch manifolds. Have installed them on numerous 400 Firebird restorations and have an orig set on a '69 428 HO GP. The longbranch manifolds look cool, but on a 350 Pontiac, doubt one would see a performance gain with added weight... then there is the expense.