cdminter - The car is a 72 toyota celica. It has a mid 70's sbc with the clam shell type motor mounts in it. When I tried the holley mechanical pump a while back the body of the pump would hit on the upper (one that bolts to the block) part of the mount. It wouldn't matter if you rotated it it was fisically just to big. I did a search on the forum a while ago and found a similar post with a guy having the same problem. Somebody replied to his post with a pic of an edelbrock pump with the same type of motor mounts on a sbc an the edelbrock appeared to fit........but of coarse I can not find it again.
I wouldnt have an issue running an OEM pump either (unless you guys think it wont supply enough fuel?) SBC 355, ported edelbrock heads, comp solid roller 234,244 @50 .610in .570ex, air gap intake, holley 670 street avenger.
The issue with running a OEM fuel pump is I have all steel braided lines and its not really ideal to use a hose clamp on the nipple of the pump. Not sure if anyone has a fix for this.