Formulajones, 130 lbs max seat pressure, unless came from factory with stronger springs and you'll need to show us the proof, but you should run the least pressure springs for the most horsepower, so it is not uncommon for the racers with the fastest cars do a lot of testing to find the minimum pressures they can get away with to maximize power. It's a fine line with some cams and a reason to run cams with slower ramps like Cliff suggests. It works at the Pure Stocks.
RAIV's, like SBC's like a lot of gear, 4.33's work great, 3.90's slow your 60' by 2 tenths along with your ET. The Z's at the race seem to gravitate to 4.88's as the favored gear. 4.56's are OK, but not enough for them there no-grunt hi-winders. The tighter you can keep 2-3 and 3-4 shift points, the better these cars seem to run.
The RAIII's are a different animal and the M-20/3.73 combo is a great starting point.
Dennis
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