Which intake gasket did you use? For the Renix or the HO?
Needs to be for Renix.
I know you think the timing is right, but bear with me.
Using Tips 12, then 13 at www.cruiser54.com. Double check it.
Tip 17 covers the exact swap you did. Read it. If you used the 92 flywheel/flexplate, that could also be your issue.