Trying go get parts together for small block build. I’m shooting for 600 n/a and adding nitrous. Or may do blower
It was suggested to me by my builder that I try to find an R3 block.

Your direction is appreciated !

Has the Ritter block got the bugs worked out of it now?

I have an R1 block in my drag car (avatar) and it's much beefier around the crank than the stock 340/360.
I think the resto block has most of those features but is the production deck height & 59-degree arrangement.

I find myself in a situation of asking for something I don't know anything about, which I try to avoid. But it looks like it's complicated with different deck heights, lifter angles, cooling and oiling is different - and I don't' know what else. I had no idea and was just thinking it was a stouter version of the LA. I'll take any advice I can get, but maybe a cross drilled main cap LA engine would work fine. I understand pay- to- play but at this stage in my life if it's too complicated I'll lose interest. This is not an engine I will beat on pass after pass at the track but maybe a few "street outlaw" kinda races but mostly it will be street driven and in a '70 Duster

Aftermarket blocks for the SB Mopar is a complete minefield for the uninformed. You'll need to educate yourself and even then you might get stuck with a worthless block. For your application you should just find an early 360 block. Many of the early 360 blocks had extra thick cylinder walls. I sold a couple of early 360 blocks that were over 0.200 thick in the walls.