heads on a 305 tpi
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Junior Member
Joined: Dec 2006
Posts: 14
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From: beaufort, SC
Car: 1988 Iroc-z
Engine: powerhouse 335 stroker
Transmission: 700R4
Axle/Gears: 3.23
heads on a 305 tpi
alright i have a powerhouse 335 stroker with the origional 305 tpi heads my question is if i can use 202 tornado heads with my engine i don't really know too much about what heads i can use
so any help would be great
so any help would be great
Supreme Member
iTrader: (3)
Joined: Nov 2001
Posts: 2,428
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: heads on a 305 tpi
What's the casting numbers on the heads you have now?
It's stamped on the head between rocker studs.
The ones ending in "416" are very good when ported with performance valve job.
It's stamped on the head between rocker studs.
The ones ending in "416" are very good when ported with performance valve job.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: heads on a 305 tpi
Everything I've read here says no you cant use 2.02 valves with a 305's small bore. You're stuck with heads that are 1.94" intake valves.
Senior Member
Joined: Jul 1999
Posts: 558
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From: Baton Rouge, LA USA
Re: heads on a 305 tpi
See if you can find any Aluminum L98 Vette heads. Have them ported w/ a valve job and that should wake up that 335. Or better yet throw on some of the 180cc AFR's. 
Definitely stay small on the valves or they will just be hogging up the cylinder area which will cause shrouding. IMO, heads are the most important area to look at so don't be afraid to spend a little extra money on professional porting or good aftermarket ones. You will be rewarded in the end.
Definitely stay small on the valves or they will just be hogging up the cylinder area which will cause shrouding. IMO, heads are the most important area to look at so don't be afraid to spend a little extra money on professional porting or good aftermarket ones. You will be rewarded in the end. 
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Joined: Nov 2003
Posts: 388
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From: Victoria, British Columbia
Car: 1989 GTA
Engine: 5.0 TPI
Transmission: T-5 WC
Axle/Gears: Yukon 3.73
Re: heads on a 305 tpi
Maybe this will help.
https://www.thirdgen.org/forums/tpi/...formation.html
Also, see the thread above entitled Vortec heads?
https://www.thirdgen.org/forums/tpi/...formation.html
Also, see the thread above entitled Vortec heads?
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