Junkyard 5.9L Magnum + Edelbrock LA heads build

MOPEkidD-3 said

So what rings should I look at? I'm guessing i'll have to file-fit them myself or do they come pre-gapped in different sizes? Is there a gap spec for factory Magnum pistons when adding light boost?

Also i'm guessing when I remove the crank to replace the bearings the rear main seal will be "disturbed" and i'll need to install a new one?

Click to expand...

Moly top rings for me all the way. It just makes life easier for little added $$.

Normal ring sets will come pre-gapped for the bore size for which they are specified (standard, .020"-over, etc.) If the bores are worn, the gap is going to be on the large side, so it's hard to say where you will end up with those bores and standard rings. (Stating the obvious!) Not sure if this is your question but I never put rings in any engine without checking the gap of each & every ring (even if they come out of the box with an in-spec gap and I don't apply the file to any of them).

Here's one of many pieces of info on ring gaps that you can find:
Everything You Need to Know About Ring Gap!

It seems foolish to me to not change the rear seal.....it be worn some already.

What is your planned level of 'light boost', in inches?