[dsraven]

like mr48 says, I too have a couple of longer bolts with the heads cut off and a slot cut in the end where the bolt head used to be. screw them in first, put a little lube on the torque converter snout, then the trans can sit on those alignment bolts and slide up to the engine block nice and easy. when done, simply unscrew the alignment bolts with a flat blade screwdriver and install the correct length bolts. sorta like using a clutch alignment tool, everything slides together lined up like it should be.
note:
never try to "suck" the trans into the engine block with the bell housing bolts. it should be easy to butt up against each other. if not, check to ensure you don't have an extra alignment dowel stuck in the trans, transferred from the last engine it was used with, or a build up of corrosion in one of the dowel holes to it's now a press fit, or, worst case scenario, your torque converter has moved and become disconnected from the trans pump drive. this has caused MANY trans bell housings to break or trans pump body damage