how much more power will I be looking at if i get that sdpc intake with the vortech heads and get my plemum ported with some larger runners and a 52 mm throttle body
all my mods are in my sig.

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86 Irocz, 305 bored 40 over, 211/221 comp cam,paw rocker arms 1.5,10:1 comp., stock heads, 100 shot of nitrous,

soon to be airflow research 190 cc heads, 373 gears to replace 273, and induction work

 

We dont know yet, nobody's used the SDPC intake yet, as its not available. But off the top of my head, I'd say its worth 20-30 HP at least.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

I would have to say go for the 58mm throttle body, if you are going to spend the money go for the max air flow.

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1987 T.A.
4 bolt 40 over MSD 6al BBK/EDL throttle body Accel coil, wires Compu Cam Roller roc K&N filter Jet custom chip Removed screens and cooling fins on M.A.F. Ported Corvette heads 700r4 shift kit 40+ 4th gear 2300 stall Stock GTA rims with 255/50/16 rear 245/50/16 front Z rated comp ta's