Percolation? Heat soak? Don't drive during summer??

You co fused me
He's an expert in that field.

with some of this... my car doesn't have EFI, its to expensive.
He's not paying attention.
Just a mech fuel pump (old one) and new avs2 carb. My fuel tank is vented. My timing doesn't advance past 36* as we installed a timing advance kit, unless even with the kit its able to advance farther than that when warming up? I have a new mechanical fan with a clutch on it.

Yes the sparking at the coil is weird and no one has ever seen it before? Lol.

Get that off there. Do you need some parts? I might have a spare 12V coil I can send. I may also possibly have an ignition box. I'm not sure. I'll look tomorrow for either or both.