[Mart]

I made an exhaust port mount that used all six bolts, but it only fits one side. I have used it on the other side a couple of times with just 4 bolts, but prefer to use the 6 when I can. All the evidence shows that just 4 bolts are adequate.

I never use the bellhousing bolts, too many reports of breakages for my liking. No reports of any problem using the FORD APPROVED method of attaching to the exhaust ports.