Bitter learning curve. Absolutely DONE with carburetors!!!

I started hearing a faint thumping sound on my newly built 360 at idle around the trans hump. Now I know this can't be good but I try not to worry to much because it's just ever so slight, but I'm monitering it and can't stop listening for it. I have about 300 miles on it and it's only been to around 4k rpms so far, it's on it's second oil change. I'm on my way home from work (about 20 miles) and decide to find out if the looming cloud is real, I'm on back country roads and I make a left, I put it to the floor mid turn and WOW! It just lights it up with a big trail of blue smoke coming off the fresh tires, love that smell.
Seems to have more vibration now, but can't really tell, maybe it's in my head from worry.
I still have a few miles before any stop signs, decide we are going to find out if this is a runner or needs torn down again, I slow to about 45mph and nail it a couple times, it shifts to second and sounds fantastic, holds it to about 4.5k rpms, firm shift (trans has a shift kit but definately needs modded) still shifts way to early.
I get to a stop sign and listen closely now, the thumping is definatley more pronounced now, it's not loud, most people probobly wouldn't hear it, but it's there and I know what it is....
The bearings are shot, ruined. During break in I had the carb issue where it was leaking fuel into the cylinders, I found this out when I changed the oil after break-in, about 8 quarts came out of my 6 quart pan. It wasn't driven much at all during the break-in, just about 20 miles, but that gas soaked oil didn't need alot of time to do it;s dirty work. UUUGGH....
I'm done with carbs forever and will have injection and a bunch of new parts before this thing gets fired again.