Magnum Shortblock VS. Non-Magnum

cactuscarl said
Can anyone tell me the difference between a Magnum shortblock (P4876906) versus a non-magnum shortblock (P4876907) from Mopar Performance?

Would Edelbrock Performer RPM Chrysler Magnum Heads work on either shortblock?

-Jeff

I believe the Magnum's oil the rockers throught the pushrods, the non-Magnum's ( LA series....) oil the shafts throught the cylinder heads directly. There may also be an extra cylinder head bolt too. I know you can swap Magnum heads onto the old LA block, so it can't be much difference. I'd also check motor mount pad location.

BTW: I'm going through a living hell with a MP non-Magnum short block thats killing me.... It ate the cam in 20 miles and I'm on rebuild # 2. Have fun..... :salut: