I just bought a set of aluminium ones 200cc intake, 2.02 1.60's. Just wondering what to expect.

 

Well, they're certainly better than anything stock, that's for sure.

Got a buddy with a street driven 383 powered 72 Chevelle (heavy!) that runs 12.2s @ 112+ using those heads out of the box. It's set up kinda like a mild street/strip car with a bit of gears, stall, some traction, medium-sized flat tappet cam, etc.

 

200's might be a tad large for a TPI motor. I would stay around 180-190, but if you already bought them its a moot point. You may loose your runner velocity and knock the wind out of the bottom end. Wow. Just read your signal. TPIS must luuuv you.

 

drop 'em on and have fun! maybe slightly large for TPI, but they'll make plenty more power to be worth the trade.