The Stovebolt Site Forums The Parking Lot '60-'66 Trucks 1970 4spd Manual into a 61?

Thanks I have a lot of miles on my 4 spd and am looking for an affordable option that still allows me to use my PTO.Is it possible to swap retainers?I've heard of opening up the hole in the bellhousing as well.I live in a remote location and don't have access to a machine shop.