Originally Posted by Transman
Originally Posted by 440Jim
The BMP aluminum block does not come with cam bearings.
The shop that machined my bores, etc installed new Clevite cam bearings for $75. The cam fit perfect.
He told me the factory Mopar blocks had cam alignment minor issues, but most of the new aftermarket blocks don't have any issues with the cam bearings.


All the issues start after the factory cam bearings get replaced.

That’s because all the production engines had their cam bearings machined on the ID AFTER installation.
Same thing for automatic transmission bushings.

They could hold tighter concentricity with this method.

This process is still in place to my knowledge.


I can understand how there can be a sizing/alignment issue in an OE block after the bearings get replaced........ because of the procedure being used by the factory for the finish sizing.

But there’s really no excuse for a $5000+ aftermarket block having the issue.
The cam bores should be in alignment and to size........ and so long as the cam is straight and sized within spec....... the cam “should” slip right in.
I’ve used 3 of the previous generation BM/Mopar aluminum blocks and those had no problems with the cam fit.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads