Originally Posted by studeman
Unfortunatley I took the motor out of the frame,had to use it for another project. Also the cab is currently off the frame. I am using a 700R4 trans. With my current setup the clearance was fine at the firewall. I set it up close, but far enough to get an HEI in and out. i will be changing to the crossmenber tube type mount due to the flimsy frame. I do not want to box the frame because I will use the stock suspension. The original frame was made to flex some with the movement of the suspension. I don't want to change that. I do remember that I was going to have to trim the front crossmember a little for the crank pulleys but not as much as your current setup. I think the crux of your problem is the big block and its larger size. I will take pictures of the current mounts tomorrow and hopefully it will help.
I think the damper should be ok. The pully isn't on, but I held it in place and it should be good, even with the belt. It's tight, but I think that if the motor tries to torque in any direction it would be right to left and up. I'd sure like to see your mounts. Your comment about the frame flexing a little with the suspension was something I hadn't thought of. It's the only argument against boxing I've heard.
The front suspension is all brand new. I had new springs built. Also I have brackets for Monroe gas truck shocks. Remember I'm not putting the first V8 in this truck. It had another 396 in it all through the 80's. I'd like to eventually put in either a Buick 455 or maybe a 327 if I want to tone it down some.