Judging by what you have, you don't need expensive aluminum heads yet. The GT-40's are good. I have a set of E7TE's that were ported and polished from Power Heads in California. They have 1.90/1.60 valves with .550" lift springs. They were only about $750 with shipping and core. For the money I am very happy with them. A friend of mine was running in the 11's with a 150 shot of nitrous. The flow numbers are good for the money. I read that they are really responsive above 5500RPM. Just thought I would give you an opinion if you are not rolling in a money tree. Here is the # to Power Heads (714)-992-4909 or their website www.powerheads.com.
Good luck and have fun installing your parts
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Black 1990 LX DSS Racing Super Pro Bullit 331, AFR 185, Anderson B31 Cam, 1.6 DSS rockers, Cobra Intake w/ 2 phenolic spacer, Aluminum DS, 3.73 gears, Tremec 3550, Lakewood SFI Bellhousing, MSD Digital 6+, Spintech Side Exhaust,
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