Hi eveyone,
I am looking for some good heads for my 91 firebird. What do you guys recommened I should get. It has a 350 in it. Prices would also be good. I am looking for some extra power so Please let me know what your opion is. Thanks Jared

 

What's the intake system? I'm a huge fan of the Vortec castings but their unique bolt pattern can cause some headaches.

 

THe intake from the org. 305 is what is on there with the TBI

 

Vortecs are good heads. To the best of my knowledge, the are cast iron LT-1 heads. They also have plenty of room for improvement. They have a raised intake runner design, so your tbi manifold might not match as well as you'd like. You can get a Vortec specific manifold and a tbi adapter if you want. To do the whole thing would be less than $800 for the manifold, heads, valves, springs, retainers, locks, and seals. There are lots of places that sell the whole smash as a kit. The adapter is like $15 at auto zone, pep boys, whatever local ***** supplier is in your neighborhood.

 

Yes they are the same as the LT1 head except for a few improvements and they're regular cooling. Installing a 4bbl intake manifold and using a carb adaptor for the TBI is a great way to get an extra 15-20hp from an intake swap.