Noisy rearend 69 barracuda 318 car

@ fuzzman - Based on your noise being on accel and decel, I'd have to agree with other posters here that it is a pinion/carrier bearing issue and not an axle bearing. Because 7.25 rears do not use the crush sleeve your changing of the pinion seal is likely not the cause of noise. Agree with many posters on here that cost of "fixing" your rear end far exceeds that of finding and installing a used replacement if you stay with a 7.25 type.