Found a 489 what to do with it?

I have been assembling parts for an 8 3/4 swap in my 72 Scamp and already found an a body housing / axles and drums that are all rebuilt or new parts.

This weekend while cruising the local U pull it I came across a 72 B200 with an open 489 with 3.23 gears that I was able to pick up for $37.50 (40% off weekend).

My question is, what would everyone here recommend for building this into a sure grip? I want to do it as cost effectively as possible. What would you do?

My plan was to take it to a diff shop and possibly get them to rebuild it, swap in some 3.55s and a sure grip but I can't see getting out of there without spending $1200ish. Is there any way to save a bit of coin?