Well I managed to press off the pulleys from the Bob Drake 8RT pumps I have, and bought a new narrow belt pulley for one side. The other original narrow pulley I had was still good. Unfortunately the new narrow belt pulley is too small to press onto Bob Drake's shafts... we tried and ended up in a real mess but managed to correct it before it was too late. The other pulley was way too big and just slipped on. Guess I'll be buying a truck crank pulley after all.
Also as a word of warning for anyone who doesn't know... there are two different timing covers for cars and trucks. The truck pulley won't go onto the crankshaft if a car timing cover is on, the pointer will hit or at least won't be accurate. Luckily I have one of each so I'll be swapping those out too. I could in theory just drill out the hole that the truck location is in, seeming as how my car timing cover has both locations, but then I'd run the risk of somehow damaging the pointer or cracking the cover trying to get the old one out. Also noted that I'd need to fill that old hole up.
I thought I'd share this because Bob Drake and I think Speedway does say the 8RT pumps are good for using an 8BA engine in a '32-48 vehicle. So basically what is needed is a truck crank pulley, a truck timing cover, and those 8RT pumps in order to at least make the engine run. They don't mention that. Not sure at this point if I'll have fitment issues with a bigger crank pulley hitting the crossmember.
