I have a shop here in Jacksonville, Florida and do nothing but Pontiac's. We've built over 150 Pontiac engines. I think the combination you described is pretty good all the way around. Your vacuum with that cam will be fine. I might consider a 3:73 gear instead of the 3.50 with the 200r4 though. I have used several Art Carr 200r4 transmissions for customers behind engines similar to yours. They have held up well and the only issue is that they underestimate what the stall speed will be on their convertors. Their "2600-2800" convertor is actually around 3500 behind a healthy Pontiac engine. I actually have an Art Carr BUILT 200r4 on the shelf for sale if interested. Regarding the engine. Make sure that you degree the cam in at around 108 ICL and do use the 1.65 rockers. Also, try a 1" spacer on your intake. I recently put one on my street car and it picked up a tenth in the 1/4.
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs
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