Ahh the old days - hammer & a 2X4 or a bench vice with said 2X4's - spend the money or are you riding that 25 LB frame I started with?
do a search. there have been a few threads on this topic. park sells the steped bushing used in their tool for around $20 (park part# 530-2), for a hybrid press. just supply threaded bar, some washers and bolts.