66 Barracuda drum to disc conversion

Robert Navarro said
Yeah i was also thinking of changing the entire rear from a newer A- body like you said but haven't had any luck.

As for the hp, most likely a 450-500 max.

I think for now, ill keep the drums back in small and maybe out an adapter for it.

No way that 7 1/4 will hold up with that sort of horsepower. I'd be a bit worried about an 8 1/4 too. You may want to look at a Jeep or Ford disc brake rear if you don't want to spring for an 8 3/4 A-body Mopar rear.