400 into 65 valiant

Yes, I expect exhaust clearance to be an issue so I will definitely take that into consideration.

The incline is taken with the car on stands, level as far as I can determine. It’s not easy to find a level surface I’m the car. I’ve used the top of the door side, the bottom of the window opening.

I did think of something, I will try to determine the side to side offset of the trans cross member bolt hole for the trans mount tomorrow.

make sure you allow for any intended body rake when at ride height on it's wheels. not many cars sit perfectly level front to back and if you plan the car to be slightly nose down that'll reduce the 3 degrees you have set up. set the body at the rake it'll ride at and most intakes set the carb mounting pad level while setting the motor at a 3-5 degree angle.
neil.