73 duster 7 1/4 to 8 3/4 swap question

Garza08 said
Well the axles are original just redrilled and I would like to know if the 7 1/4 would fit.... And if I re drill the drums would it affect the performance or usage

I it were me I would get new axels cause redrilling them leaves less than 1/4 inch of meat left for the studs