Big Block Build is what I'm calling mine. New pics inside

[Chevy Fleetside]

Originally Posted by 1963c-10

Did you trim the frame front the motor mount back to the cab for clearance? Im at the point where I'm ready to do the frame mods and it'd be nice to know where to trim prior to engine/frame mock up. Thanks in advance for any help. And I'm guessing about 1/4" - 3/8" to trim?

For the motor mounts I trimmed back about 1/2 inch. I used the rear holes but cut the firewall. As for the headers... I just put them in and made some marks on where to trim the frame. I think I just used a grinder. It wasn't very much if I can remember.