That 4 bolt main truck is pretty desirable. I'd hang on to it and rebuild it. Get this and you shouldn't have any problem doing it yourself How to Rebuild Your Small-Block Chevy https://www.amazon.com/dp/1557880298/ref=cm_sw_r_apan_glt_i_9GW1DZZ28R65BBK33H9W
You should purchase a book to help you with this project, I would recommend How to rebuild your small block Chevy https://www.amazon.com/dp/1557880298/ref=cm_sw_r_cp_apa_glt_fabc_MSZHF5Z7SPW4ZN999E5N I see them in used bookstores all the time too.
David Vizard writes a series of books on SBC building... yes, it's not Ford, but you'll still learn a TON from reading: http://www.amazon.com/How-Rebuild-Your-Small-Block-Chevy/dp/1557880298/