Need 7 1/4 Differential

Worse comes to worse, not going to under cut hesperia here, but if it doesn't work out I have a 7 1/4 in a 69 Valiant that needs to be swapped out for a LBC 8 1/4 Ive been putting off. You help swap and bring two decent 14" LBC wheels done deal.
Valiant is near 710 fwy in south gate (burb of L.A.)