I have the original heads on my 85 Trans am 305tpi. It needs new valve seals any way. I want a performance gain so should I look at getting new heads or port the stock ones? If I get new ones which would be the best for the intake manifold that I have now.

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85 305tpi Trans am
flowmaster exaust
K&N air filter, 4:11 rear gears

 

Id say, port the stock heads and install the seals, springs yourself. You may want to have them milled and/or a 3 angle valve job done depending on mileage and plans with the car. If you plan on anything more than 300 HP, a decent low-buck alternative are Corvette Aluminum heads (88+). Work well stock or ported and are a definite budget mod.

 

where is the best place to shop for vette heads? my local dealer wants more than aftermarkets heads. somethin like 600$ each.any suggestions?

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white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

Rick-
Sell it and buy a 350! Just kidding man! Its me, Jeremy from SEMO! I plan on porting my 350 heads my self when I build my L98 this summer. I also plan on using my ZZ4 cam. Someone gave me a link to a head porting site. I'll see if I can find it. Good luck man

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'91 GTA:
www.fbody.com/members/91WS6GTA

 

You can buy complete S/R Torquers from Jegs for $740. They are cast iron, but thats the only drawback. Porting and doing all the work on the heads at a machine shop will cost a bundle, so if you were going to go that route, just buy the new heads.

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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, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base

 

Will the S/R torquers bolt straight on to my manifold? Remember the car is a 85.

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85 305tpi Trans am
flowmaster exaust
K&N air filter, 4:11 rear gears