Originally Posted by Kris82
of course, i have a 76 wagoneer, the 360 broke a piston rod , because of the oiling issue.
I found a 401 and decided to use it as a rebuild, I have completley gone through it, new pistons, bored honed, heads done. Not a racing rig by any means, but the shop that did the machining suggested the oiling mod. Since I had the oiling issue with my 360 i didn't want to risk it on the rebuild. I bought a new timing cover, and am using edelbrock chain and gears on that. I have a 4 barrel edelbrock that was on the 360. hopefully not missing anything.
Sorry about the 360 man. My 360 started knocking after I revved it just shy of 5,000. That's why I ended up finding a 401 as well.
The 401 is a great engine.
What RPM range will you be running it to?
If its under 4,500 you can run an extra quart safely.
If its over 5,000 the oil mod is a good idea but not a must until you get way up there.
If your cranking 5,500-6,000 an internal pick up larger capacity pan is a good idea.
If your running 6,000-beyond a good timing cover , an external sump higher capacity pan, and the valley oil mod is ideal.
There are a lot of AMC guys that wind their engines way past anything I ever would and don't have the mod.
If you've already had it done so be it. It would make me sleep a little better at night. If it ever blows though you will lose oil pressure.
I personally just ordered the Bulltear timing cover with HRC gears and external dual oil filter mod. Next I'm getting a Canton road race pan with internal pickup. This combo should be good to 6,500. But I won't be cranking it past 5,500 because it has cast pistons and my needs don't require anything that high.
Some people may disagree with me on here but I err on the cautious side.
Hope you found some useful information in there.