Scratchn’s block getting cleaned and bored

got the block home and did some drilling. 13-1/4" extra drain back holes in valley, galley feeds to 9/32" block/cap/pump drilled 1/2" and gasket match pump to cap & cap to block added 4 extra holes in the filter plate, restrictors/plugs in block to reduce oil to rocker shafts. ( doing this because the stock roller lifters are oil-thru with hollow PRs and will be too much oil in the VC area)

got a set of Mopar HP rod bearings, cleveite full groove main bearings along with the core plug kit & intermediate shaft bushing for the block. will be dropping the crank in tonight & working on installing pistons/rods.

got the comp 901-16 springs and gaskets on the way next.


a little FYI on pre-mag & magnum engines. early pre-mag roller engines used a non-oil thru lifter and solid 5/16" PRs with the LA rocker shaft oiling. late model pre-magnum engines oil the LA rocker shaft style along with the oil-thru lifters & hollow PRs. IMHO is why late model pre-mag engines have such killer VC oil leaks with 2x the oil in the VC area.

early magnum engines 92-93 had the block drilled for LA rocker shaft oiling but blocked it with the head gasket and oil the pedestal rockers thru the lifter/hollow PRs

which they may have done on late model pre-mag engines with the composite head gaskets. I know a replacement gasket does not block the hole and it will oil both ways to rocker shafts which IMHO is too much oil in the VC area causing leaks.

this is why I add restrictors in the block to restrict oil flow to shafts as it will be oiling thru lifters & PRs and the LA rocker shaft oiling. ( I almost want to try to block it and see if the lifter/hollow rods would be enough oil on LA shaft/rockers.) I do know pre-lubing it with a drill it shoots oil from tip of rockers to the ceiling in my shed on all 16 rockers. and plenty runs down into the rocker cup/shaft area. but that's on the stand cold and not hot under extended load/run times.

I also noticed the evac system in the headers tend to suck oil when it is oiling both way as there is a lot of oil/windage in the VC. I did not have this on my early pre-mag engine with non oil thru lifters & solid PRs or any of my older LA engines.

part store want to sell you a 3/8 chevy PR as a replacement or the hollow late model PRs so anyone out there have any early solid PRs or non oil thru roller lifters?? I cant find any around and only run up on the last of the pre-mag engines in JYs

Can you post intake pics?

sure. I will take some pics tonight. I will be running a Holley Street Dominator intake with a Holley 650cfm vac spredbore carb ( q-jet replacement for 85 d150 I got NOS/NIB from a military surplus sale.) I added a QFT adjustable vac pod to it. I have found this is well worth the 40bux for dialing in a vac 2ndary carb over the R&R pod spring.

2nd choice is my LD4B intake with the 650cfm double pumper. I will run the 4 speed with this combo.

I also have a eddy performer RPM-airgap intake with a 750cfm dp that I modified to use an 850cfm throttle plate on. gasket match main body to the 850 throttle plate for 1 3/8" ventures 1 3/4" throttle blades. squared up air bleeds/jets converted it to 4 corner idle lots of velocity and throttle response with this mod and it is 40 yrs old and works good as a new high $ shiny carb.

moparlarry360 is helping me with the pic posting and will come when he has the spare time to post them... THANKS Larry!!

Hey my pleasure

NOS Full groove main bearings right Mike?

More good stuff

And…

Love that old school intake back there ^ btw!

thanks Larry, yes you would be correct on the rod & main bearings.

I am sentimental about the intake as I got it from Larry Green AKA 340shorty a few days before he passed away. since it is a Holley intake only fitting it have a Holley carb.

I am trying to decide what rear main seal to use. in both of the 90-91 318s I have I found the rope seal. but in all my gasket set I have the newer replacement seal. once decided or NOS Mopar rope seals found I will drop in the crank and pistons and get the bottom end buttoned up.

ordering up 16 NOS/NIB Mopar roller lifter & PR package. 11$ each on ebag. I ordered up a Mopar t-chain tensioner/chain/gears from the local Mopar dealer.

I wish superformance still made rear main seals for 318/360 because I’ve heard they were best but I don’t think they do.

thanks for reminding me. I want to look into some of the other engine gaskets as well.

Scroll down the page. It appears there are 2 listed:

http://www.mopartsracing.com/parts/Superformance_Gaskets.html

Um, wonder if that's old stock or if making again. I like

That's really cool. I had a street dominator and a Q-jet replacement on a 327 a lifetime ago. Worked real well.

Progress.
Crank in & torqued.
Pistons in &
Rods torqued.
Oil galley plugs in & intermediate bushimg in.

Did you get the pistons zero decked?

We have to wait for Scratchnfortraction to chime in for answer.