Without the clutch or trans in place? I'm finishing up the wiring for the EFI in my '66 and would like to verify that it runs good before I put the fenders back on & etc. Just shortening wiring and making it look pretty right now.
I have run a motor without a trany for the same reason you are asking. I do not know if it recommended though. To be safe you may want to make sure the exhaust is hooked up and mounted well to prevent the engine from rolling on the mounts excessively. Also I would hesitate on the urge to rev it up.
If the flexplate or flywheel is on you should be OK to go.
I think this is a given, otherwise it would be a real pain with no ring gear for the starter to engage.![]()


You think the exhaust controls engine movement that much? I'm not saying it doesn't, it just seems that they would not prevent the engine from moving unless it was resting on the motor mounts without being bolted down. The exhaust is hung on flexible hangars and they are free hanging all the way from the headers to the backseat.
Just how close to the fan is your hose?