I've got a 67. Can I mount the headers on the motor before I install it in the car. The fenders are on, and it does have P/S. Thanks.

Not a chance.

Put the drivers side header in the car first, wire it to the hood hinge in kinda the place it needs to be, then drop the motor in.

The pass side will go in easy from on top (as long as you don't have a/c)

Thanks Jim. and yes I do have A/C, so I'll have to mount them both in the car.