Hi.
Sounds like they might have milled to much off of the heads. If they did and did
not mill the intake manifold to match you could have a vacuum leak,which will
make it idle fast just like having a vacuum line off. Just food for thought!!!:(
I installed a double filter kit and use two PH8 filters works great
also have high volume pump.
87 GN 11.7 116mph 1/4 et.
91 ZR1 13.2 107mph
79 TA 13.1 108 mph
Won't Start
Hey 6Pack
Check the ground wire on back of motor pass.side head .I found it broken on three different cars and they will not start with it broken.Should be a ground strap and two wires coming from ecm.