Quote: Just some comments after reading this thread that may be helpful. Not trying to be a "know it all", just sharing what I have experienced.
- The Apache heads will fit on a 5.7 block - Another alternative for good heads is Thitek - The 5.7 block is a cheaper and more readily available alternative. - If using a truck 5.7 block you will need to account for the different dipstick location and if using a pan with a dipstick tube you will need to plug the dipstick tube hole in the truck block. - If using a 5.7 truck block and a 6.1 timing cover and AC you will need to drill and tap 2 holes for the AC bolts in the block. - To delete MDS just replace the lifters. You can leave the MDS components in place - no need for plugs. - These engines do not like a lot of timing so be careful. - Stick with fuel injection and a 6.1 intake for most applications. - NA or forced induction they can make a decent and reliable HP#
We have a 3700# car, NA, 430ci going 10.0 in the heat and should nick 9's shortly.
We also have a 5300# Jeep, turbo, 370ci going high 9's and daily driven.
These engines are impressive and I can't wait to see when someone really starts pushing them!
What kind of changes are necessary for the 6.4 heads to work on the 5.7 bore? Just a notch of the bore? Special piston valve reliefs? Would like to jump on a set of 6.4 heads if they can be used on a 5.7 block efficiently...if they are a waste on a bore that small, or not worth the work, then I am just going to pass.