Slant six cam

Go for the Oregon Cam Grinders #819. Same cam. Plus, you can have your old cam and lifters reground to this and be much cheaper. Oh, and this cam would like 8.5-9:1 TRUE (as in measured) compression, and possibly some 2.94-3.23 gears. This cam will 'come on' right around 2500rpm

I am currently shopping my junkyards for an 8 3/4 rear end.
I still haven't 7 1/4 on.
Would that be a Problem?