B1MC in this case...Paired rockers require pushrod oiling and if your block did not come that way options are limited..

Ok, so this is just for blocks that have not had the lifter galleys drilled?

I messed up when I ordered my Keith Black block and didn't get it drilled for pushrod oiling because at the time I was planning on running my 440-1 Indy heads. Tom Hemphill drilled it for me so now I can oil either way. My B1's require pushrod oiling.

Well here is our tale. We actually have one that was ordered WITH pushrod oiling from KB and a 55MM roller cam bearing deal. What we got was babbit and 54 and pushrod oil. Calls were made and KB said they could fix it. Well we got back was a 55MM roller cam option and LOST out pushrod oiling. Not exactly what was ordered or paid for so we too will likely end up fixing ours later. Caused us to go with common shaft rockers and we will see how it holds up. Whole engine is kind of a one off deal anyway at this point. We plan to run it for a bit to see how things look after some laps. When we tear it down we will address the pushrod oil issues..

I didn't order my Indy block with PR oiling. After giving it more thought, I wasn't crazy about splash oiling a roller cam so I decided to go the internal manifold route. My thought is that the lifters will live longer, especially on the street with pressure fed bores and roller axles. I could be completely wrong, but I sleep better this way.

FWIW...my KB block doesn't have lifter oil galleys and mine is a solid roller. No problems w/ lifters in 10 years.

Would agree plenty of oil there w/o pushrod oiling at the lifters. Up top is where you will have the issues. When I ran a Hemi in the Cuda we had spray bars for the springs rockers and tips. IMO pushrod oiling is just a better way to do it and on some cases a necessity as in paired rockers...

I have wondered why guys went to all of this trouble, now I know!

I'm at a crossroads, either build a manifold or send the block to be drilled. What kind of money do you have tied up in the oil manifolds? I don't know how crazy I am about the tubing vibrating around and possibly cracking. I'm in a little different boat, building a street car. Bushed roller lifters and paired t&d rockers.

No question...I'd have the block drilled. I wouldn't want all that mess in the lifter valley.

I probably had close to $300.00 tied up all said and done. I made the manifold out of 1" square stock. Not gonna lie, it was a HUGE PIA. I spent roughly 40hrs on the whole mess. I also took great pains to get the ports to intersect the bores at the band when the lifter is on the heel of the cam. Necessary, probably not! But as I said before, this is one less thing I lay awake at night pondering.

I had a pretty easy time of it . A Endrlie fuel distribution bulk head was $90 , and then the lines and fittings $150-$200 cant remember .

I made a jig for the lifter drilling and had it done in a day .