To me it's inappropos to tell someone who's playing at best small venues with a Bassman that "you don't need overdrive or compression because Jerry sounded fine guitar into amp." I said it before but I think my point continues to be overlooked so I'll repeat it. Fender amps are not designed to sound their best at 1-3 on the volume knob. They really come to life at 4 or higher. If your amp is a DR, at 4, you're at small club volume. With a Bassman you're not. However, Bassman amps, in my experience, take pedals well even at lower volumes. This point underlies my prior response and I'm stickin' with it!
P.S. to the OP: PM me if you live in the D.C. area (since my M13 made my pedalboard obsolete, I'm swimming in individual effect pedals and would be happy to loan you some to experiment with if we're not talking shipping stuff).