I drill a .015" hole in an alum 3/8 NPT pipe plug for the rear of the dr side SB horizontle gallery (& you can see its bennie when you preoil) to oil the intergear and the same in the front of the pass horizontle gallery to lube the chain (& a ~3/8 hole in the cam plate) for room for the squirt to pass thru. Gonna do the same on the 451 I just ain't figured how to preoil the intergear cuz its configured different.