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Mopar Magnum race block #1775259 03/09/15 08:22 AM 03/09/15 08:22 AM
Joined: Sep 2013 Posts: 9 Australia Qld V VG423 OP member
VG423 OP member V Joined: Sep 2013 Posts: 9 Australia Qld	I have a mopar magnum race block P 5153452 360 mains. mopar instructions say must use 340 pan, the 340 pan appears to big at the rear seal area. the 360 pan will not sit down far enough with the milodon 41007 one pce gasket.Also the factory spider for the dog bones is hitting the lifter boss area. Has anybody ever finished one of these blocks off? Any advise greatly appreciated.

Re: Mopar Magnum race block [Re: VG423] #1775260 03/09/15 11:10 AM 03/09/15 11:10 AM
Joined: May 2014 Posts: 108 Socal L littleVAL member
littleVAL member L Joined: May 2014 Posts: 108 Socal	That is interesting because in the US they say all of the race blocks are supposed to have 360 pans even though there are several that use 340 pans. Looks to me like 360 pan will fit perfect. The lifter area is hitting because it is cast for 48 and 59 degree lifters. You have 59 degree so can grind off the 48 degree area for the clearance you need. Does the valley have the 3 bolt holes for it though Last edited by littleVAL; 03/09/15 11:12 AM.

Re: Mopar Magnum race block [Re: littleVAL] #1775261 03/09/15 12:01 PM 03/09/15 12:01 PM
Joined: Jan 2008 Posts: 4,255 Canada WO23Coronet master
WO23Coronet master Joined: Jan 2008 Posts: 4,255 Canada	I thought the 360 had a bigger rear main seal?

Re: Mopar Magnum race block [Re: littleVAL] #1775262 03/09/15 12:15 PM 03/09/15 12:15 PM
Joined: May 2006 Posts: 1,260 New Mexico A Adobedude pro stock
Adobedude pro stock A Joined: May 2006 Posts: 1,260 New Mexico	Dump the stock lifters and get some MRLs, probably still have to machine the block for clearance. 2001 Dodge Dakota 408 All Motor 11.27 @ 117.83 mph 2017 NM Mopar Challenge Series Champion.

Re: Mopar Magnum race block [Re: littleVAL] #1775263 03/09/15 03:58 PM 03/09/15 03:58 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	Quote: That is interesting because in the US they say all of the race blocks are supposed to have 360 pans even though there are several that use 340 pans. Looks to me like 360 pan will fit perfect. The lifter area is hitting because it is cast for 48 and 59 degree lifters. You have 59 degree so can grind off the 48 degree area for the clearance you need. Does the valley have the 3 bolt holes for it though Tons of meat to safely grind clearance for the lifter. As for the pan just put a little KY jelly on the gasket so it slides over without pulling the gasket down and distorting it and bolt it on. I am not causing global warming, I am just trying to hold off a impending Ice Age!

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