I am looking for at least 350HP but I do not know if it is better to go with a ZZ4 and add a larger TPI injection or just have a quality rebuild done with a nice set of aftermarket heads and cam. Any idea's will be appreciated. I am also looking to keep this emissions legal.

------------------
1992 L98 DGGM B4C (X-FBI car)
1992 X-CHP B4C, Black and White.

 

You could probably build your own engine and make as much if not more power than a ZZ4. You can find aftermarket TPI parts for sale on ebay for pretty cheap, or you can just go buy new ones. A set of Trick Flow heads can cost less than $1000, and you can get a ZZ4 or LT4 HOT Cam from GMPP for around $170 new at gmpartsdirect.com. The key is to be patient and take your time, you can built a powerful engine for not too much!

------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, LPE High Flow TPI Baseplate, Edelbrock TES 1 5/8" Headers, Catco 3" High-Flow Catalytic Converter, Hooker 3" Aerochamber Cat-Back System, Transgo Shift Kit, Performance Resource Chip, Accel Ignition, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET: 14.32 @ 97.7mph
(corrected for elevation)

 

Do you think it will be emissions legal. Here in AZ, they use the IM240 test on rollers. I was hoping to be able to build one cheaper than a ZZ4 crate motor.

------------------
1992 L98 DGGM B4C (X-FBI car)
1992 X-CHP B4C, Black and White.