Does anyone know what type of heads I can use with my 90tpi? Would lt-1 or ls-1 heads work?

 

No, you can't use LT1 or LS1 heads on our cars. The LS1 heads are made for the new engine block, have equal spaced intake and exhaust ports, and would never fit. The LT1 heads are set up for reverse flow cooling, and wouldn't work without extensive modifications to the cooling passages.

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Black 88 GTA L98
New engine is in!
ZZ4 bottom end, Edelbrock 6085 heads, LT4 HOT cam, GMPP 1.6 RR's, ported stock TPI, SLP 1 3/4" headers, no cat, Dynomax cat-back
E.T.F.A Member #11

 

Look at the World Products S/R Torquer heads that are offered at Scoggin-Dickey. Their link is conveniently placed at the top of this page. $650 and you'll be stylin'.



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Daniel Burk
http://www.isthq.com/~dan/fcar.html
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff. PST suspension, Braided stainless brake lines, Koni struts, 11-inch rear disks,Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Turbine Technologies 2500 stall converter, underdrive pulleys, Crane Hi-6 & more.
1.05g skidpad verified.
New best E/T! 14.039 at 100.82 MPH in 41 degree air at Stanton, Michigan.