Jun 27, 2008 #1 6 69charger Well-Known Member Joined Feb 2, 2008 Messages 118 Reaction score 1 I'm going to do some engine work and in the process I plan on boring out my stock '69 318 .40 over and I was wondering if I should go 3/4 or full groove on my main bearings?
I'm going to do some engine work and in the process I plan on boring out my stock '69 318 .40 over and I was wondering if I should go 3/4 or full groove on my main bearings?
Jun 27, 2008 #2 M moper Well-Known Member Joined Dec 27, 2004 Messages 15,912 Reaction score 2,540 Location eastern CT Stock, leave stock. 1/2 groove is more than fine. even medium performance is more than fine with stock bearings.
Stock, leave stock. 1/2 groove is more than fine. even medium performance is more than fine with stock bearings.
