1967 GTX 440
Member
I have 1967 gtx with 77 440 with edelbrock tm 7 with 750 holley and mallory unilite dist. Motor was rebuilt before it was installed. It ran good for about five years. Out cruising one night, ignition cut out and came back on, mufflers exploded. limped it home. new mufflers and msd distributor. Though it was fixed. Then had off line stumble and spark plugs started to foul. Check valve train with stamped rockers, no problems. Then took cylinder heads to machine shop, they changed valve springs and r & r valve guides. After reinstalling heads and tm-7 with holley, it never ran well. Now runs ok With edelbrock performer intake and 750 edelbrock carb but down on power. Also new plugs, wires and Carter fuel pump. New 3/8 fuel tank sending unit and 2 1/2 exhaust system last fall. Also last fall rear main seal and timing cover seal started to leak. Did compression test 125-135 psi. vacuum 18in at idle. Oil pressure 65 psi at idle.(has high oil volume pump since rebuild) Fuel pressure 5.5-6 psi What could be wrong? Thanks for the advice.
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