Embarking on a new project. I am planning to put a nailhead in my 40 Super with a ST400 tranny and converting to an open rear. I researched a lot of archival threads, but did not find the info I wanted, and did not get any response from a couple of PMs I sent. I want to leave the chassis and body alone as much as possible, and plan to run the original steering box. The open rear will entail GM truck arms with a 58 Edsel rear (that I understand will bolt in). Is there one engine that is better than another for this (322 vs. 401?). Exhaust manifolds? Off center the engine? etc.? I know this subject has been beat hard, but I know someone out there has done this before and can help.