Loud Tick or Pop at WOT

[Shugalou]

Hey guys,

I'm trying to diagnose an issue I've been dealing with for a bit.

The motor is a 305 with a Q jet 4 barrel and at WOT I get a loud tick sound almost like one loud pop, and power will cut out and I get out of the pedal. Everything returns to normal once I get back into mid and light throttle but when I hit WOT again I get the same thing.

Could this be a spark issue? I think my lines might overlap near the distributor or could this be the coil ontop of the distrubtor? Or is it something worse?

Any help is appreciated

Thanks guys