by Mark Nunn » Fri Aug 07, 2020 1:17 pm
When you installed the Z head, did you test the head by putting it on without a gasket and with loose bolts to check for interference between the pistons and head? Hand cranking would reveal interference by lifting the head slightly. There could be interference especially if your engine block has been decked and/or if your block has a large overbore. If that is a problem the combustion chambers can be ground for clearance.
I can't help from here with the glowing manifold. Are you certain that it was not glowing before the change? You may have an exhaust gasket leak.
FYI, if you post this question in the general discussion forum will get you many more responses and advice.
When you installed the Z head, did you test the head by putting it on without a gasket and with loose bolts to check for interference between the pistons and head? Hand cranking would reveal interference by lifting the head slightly. There could be interference especially if your engine block has been decked and/or if your block has a large overbore. If that is a problem the combustion chambers can be ground for clearance.
I can't help from here with the glowing manifold. Are you certain that it was not glowing before the change? You may have an exhaust gasket leak.
FYI, if you post this question in the general discussion forum will get you many more responses and advice.