hey, i have the opportunity to get some heads off a 1991 305 TPI for pretty cheap. The guy said that I could take them to a shop and if they are cracked he will give me my money back. I was just wondering if it would be worth all the effort of tearing my motor apart to put these on? What kind of gains should I expect?

 

I put them on my car, and I think if I were to do it over again I would leave the heads out. Save the time, money and effort for a rebuild or a bigger displacement engine. If you were rebuilding the engine it might be worth it, but if you're putting them on an engine with some miles on it I would skip them.

For what you would spend for a valve job you could probably do the lt1 cam swap and get new vavle springs.

P.S. if you do get the heads, and if you are already going to get a valve job done on them, have 1.94 intake valves put in them, I wish i would have done that.

 

the heads will be worth it if you get them for a really cheap price an port, polish them, and get bigger valves on them, but keep in mind not to spend to much, cuase vortec heads willl be much better in the long run

 

True, Vortec head will be better but then you would have to buy the Scoggins intake which is about $400.00. But if you are willing to do that it is no biggie!

 

No you wont. Edelbrock makes a vortech carb intake that can be used with a tbi adaptor plate. GM even makes a vortech tbi intake manifold.

 

Your right, the scoggins is for the TPI setup, price wise though it is the same! I dont know about the Edelbrock setup though?

 

You can use any carb intake manifold for tbi as long as you have an adaptor plate.

 

The vortec TBI intake is $350 from jegs. Carb intakes are a lot cheaper.

 

Oh I never priced stuff on Jegs, the intake I was looking at was in the GM performance catalog, I usually try to buy parts factory because I get it at cost!

 

yeah, I found a better deal with a guy I met on these boards and he will sell them to me for 40 bucks.

 

What are the specs on TPI heads, for ex the ones on a 92Z