Originally Posted by GMCBEAST
Is it possible when reinstalling, the plug wires were not installed right? As mentioned before Pontiac's timing is counter clockwise. Firing order is the same as Chevy I believe which is 18436572, with #1 being (while facing motor) on front right with 3,5,7 behind it and #2 on left with 4,6,8 behind it. Distributor sits on opposite side of cam gear than Chevy so it spins counter clockwise. Just something you can check out, hope it helps.
Sorry, forgot to mention plug wires go back on distributor counter clockwise, for some reason it wouldn't let me edit my post.