need help on my 350tbi

[Fast355]

There are many different ways you can go. A Performer RPM intake with a TBI adapter plate can make a good intake combination. The above mentioned "Ultimate TBI Mods" give some good ideas on helping with intake air flow. http://www.thirdgen.org/ultimatetbi You can Google it as well for even more ideas and info.

I'd think a camshaft kit like a Lunati 10120701K kit would go well towards increasing power. You need to confirm the heads and piston clearance would be good for that lift.

2 big things required to use Vortec heads are the self-aligning rockers and the Vortec specific intake.

IMO that cam is wrong for a TBI head setup. The TBI heads really want and need a moderate duration, tight LSA, and really do not benifit from a split pattern. I would run this cam installed on a 106* ICL.

http://www.summitracing.com/parts/lu...make/chevrolet

If you rarely rev your engine over 4,500 rpm this cam would be even better. I would likely run a 1.6:1 roller rocker with this one.

http://www.summitracing.com/parts/su...make/chevrolet

I also feel this Comp Cam would do very nicely as well. Would be even better with 1.6:1 rockers.

http://www.summitracing.com/parts/cca-12-205-2/overview/make/chevrolet

The RPM intake is a GREAT match for TBI heads as far as port dimensions go but will need the 4 center bolts elongated and angled shims fabricated for proper intake bolt seating and sealing.