Small Block Duster
Well-Known Member
I've been looking at the advertised rod and main bearings. I have to amend what I said earlier and I haven't yet found anything like 9 unders or 11 unders. Only 1 unders so far. Hopefully I won't need to worry about it. Also, I was asked earlier in this thread if I was using full groove main bearings. I am. Now I realize why my machinist wanted to buy the bearings. The Chevy crowd told me that's a bad idea. The research I've been doing on this forum seems to indicate that full groove main bearings work okay in a Mopar. I think that made my decision easier. I'm going to run a high-volume oil pump. A Melling M72 HV. There has been discussion in this thread and others as to whether those have a high pressure spring in them. When looking online at the Meiling site and others I keep seeing them listed with a standard pressure spring. So I will use the Mopar performance spring I already have. Also, Summit lists a Mopar performance high-volume. What is the difference between this and a Melling M72 HV?
