Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
I am sorry for the long wait
can you take a compression test and see what the compression is on the cylinders ?
if there was flames coming out of the carb the odds are something happened to the timing chain or possibly a piston or head gasket
you need to take a compression test and see what all 8 cylinders read for compression
if all the cylinders are well below 100 psi there is a timing chain or possibly lower distributor gear failure
if just one or a few cylinders show low then there is something specific to those low cylinders of piston failure or a head gasket issue which the valve covers need to come off to be sure no pushrod's broke also
just confirm the compression is good in all 8 cylinders and that the spark plugs all look good and the same visually
if the compression is good and the spark plugs look good then the odds are there is a timing or distributor failure causing this issue
how are you making out ?
did you have any more questions ?