My old school 340 upgrades and results.

Bad ignition ? Wires ? rotor? Cap?
Wow, it's been popping @5200 for 20 years!?!
A drag car !?!
LOL......
you know what, though? Here is an old school build pumping 12.0's in the 1/4 with a serious issue... wasn't a few folks arguing about those old skool cams.... never mind..... :rofl:

factory cast intake, cast heads, all kinds of hug bush here..... get'n her done