This is a virgin motor,bottom end looks good,has a small ridge at the tops of the cylinders. Should I worry about the ridges? It has stock cam,fresh heads and thats it. Just going to cruise it. Any thoughts,concerns?

std bore?? what do you mean virgin eng? never used

I was taught, if ya can't catch it with a fingernail, it's OK.

If you can feel it it is not good to leave it in. There is always the chance that the new ring new square edge will hit the ridge (no matter how small the ridge) and if this happens it will break the rings and possibly damage the ring lands. Why chance it. If you are lucky you will be fine.

If the ridge is there it's not going to hurt anything if you're not touching the bottom end of the motor. If you're just going to bolt it back together and drive, you're fine.

The ridge is a problem if you're changing pistons and don't want to bore out the cylinder, then the rings may clip the ridge and that can break them. I've never heard anyone break rings when they did a hone'n're-ring and reused the stock pistons/rods but in theory it's possible. I did the budget refresh on my 440 with a ridge and had no problems.

By virgin I mean original internals. I plan on cruising it mostly,sure it will get beat on here/there,but just cruising and couple hour long hauls in the summer maybe.
I'm looking into a re-ring/bearing kit,still kicking it around.
If the bearings in the bottom end look good,should I leave them or change them for longevity? I figure if they are fine,either leave them or it would be a simple swap from old to new. Any suggestions on this?
For the most part,it is a very soft ridge,you barely catch it wih your nail. I thought I would ask before I threw the heads back on. It will be a few days,they are at the shop getting .030 cut off.

I picked up a Central pin type inside micrometer years ago for quick measurements in situations as this. I'm glad I did, and it will get you a great idea of how much wear you have immediately under ridge. (where the biggest wear is in most cases).

I agree w MFL , it has caused broken rings/collapsed lands and I am still in shock from the extensive broken rings thread of several days ago. you can rent a ridge reamer for cheap and the trick is to expand it out just the right amt (not too tight) and put the box end wrench on the center nub clocking it so you are pulling the cutter around as opposed to pushing it into the wall which will gouge it. You will have to change positions many times as you go around the cyl so you are always pulling the cutter blade which takes alot of discipline and when you get close to getting the ridge down to the wall CLOSELY monitor the next couple of turns as you dont want ALL of the ridge taken off as the cutting rate varies and you dont want to take ANY off of the wall so you need to stop JUST before that point because when the piston is at the top is when combustion is taking place and ring seal (& power produced) is the most critical and you dont want to make the taper worse. I'm assuming the eng is still in the vehicle? Myself I'd rering/bearing it (w moly rings) and read "breakin secrets" (a 5 minute read) at www.mototuneusa.com. EDIT had the address wrong

Let me expand on my comments above. If you are going to do a ring job, take the ridge off. I was answering your Q that there was a ridge, very little, should you worry. No. New ring job? Yes. How good is the cylinder pressure? My 383 engine had 90,000 some miles on it, with a slight ridge. Cylinder pressure with the original timing chain was 140. I left it alone. That was 9 years ago and the engine is still running strong, no smoke.

Everybody's situation may be different.
Compared to the 440 blocks,383 are more prone to have uneven wear in the bores and ridges.
I prefer to have NO ridges.
During teardown of my 383 all appeared to be fine.It was a running motor with 62,000 miles on it.
After a hot tank and honing,the ridges were bad enough to catch your finger nail on them.
Plus,my ring gap was too big,or not reading even down the bore.
Ended up with a .040 bore.

If you did a valve job you'd be much better off re ringing and new bearings. Hone that ridge out. New valve job on an older motor without reringing can cause problems in short order. Just do it right once. Your half way there now.

Just have to know what you are doing with ridge reamer.You can do more harm than good.Ive done a few cheap kobs.Used my hones and got rid of the ridge.Ive had a few motors that had wuite a big ridge though.Rocky