Dart shp block

[carl hinkson]

I have machined and sold probably 150 of the SHP blocks and so far no issues with oil returns, The block should have an oil return in the middle of the lifter galley all the way to the front, I feel you don't need to drill any required holes in the front of the block as no one else is having any issues that I know of..

If your running roller lifters don't not restrict them as most lifters are restrctied to begin with!!

If your lifter bore clearance is .0014 to .0019 you should be fine.

[Greg Hill]

The slots in the lifter valley were sealed except for part of the back one. The problem is that with the slots sealed and the webbing cast into the block to make the cam tunnel stronger there was no way to get the oil back to the pan from the front of the motor. Some holes drilled in strategic places should fix this. The webbing was acting like dams in the lifter valley.

[Alan Roehrich]

I suppose you're trying to keep oil from going down past the cam onto the crank and rods. Not sure there is any gain there, there are tons of fast big blocks with the lifter valley drains wide open.