too tight block!!!!

[2pt2]

Just wondering if I'm missing something here. the motor in my 87 charger had puked a cylinder a year ago. I pulled the top end, pan etc. replaced the bad piston #3. Re-ringed everything using moly rings. On the top end I took the oppertunity to replace the valve stem seals. Also added +20 injectors
Put the motor back together , it seemed to run fine but rich with a bit of smoke, Cylinder 3 keeps fouling plugs. I got a adj FPR to take the fuel back to around 43# a/f meter seems like the motors happier. I then added a mopar 413 cam with the stock valve train parts and a Findaza adj cam pulley (cam centered at + 13 deg. ) Car still runs hot and smokes.
Tonight I was going over things and noticed when I went to rotate motor by hand it was near impossable...yes it was out of gear.
When I check compession I read 140, 145, 152, 150 repectively.
I checked with a leakdown tester and all good there and I pressured the cooling system up to 30 lbs no leaks.
Is this motor too tight are the rings still seating, am i missing something simple??
The motor only smokes under acceleration, and only boils over at shut down. other than that i could drive her all day with no problems.
Any ideas drop me a line

[B.A.P.]

CM rings do take a while to seat, but if #3 got hot when the piston went, how did the head look? maybe a hairline crack?

[2pt2]

Didn't see anything cracked. I did have a "local" shop also check it and nothing. I know I had seen many of thes with the infamous hairline between the valves. Still really concerned on how tight this dern thing is.

[B.A.P.]

did you match the piston to the bore? You know how there are A, B, C, and D piston sizes, maybe the replacement was a little big???

[2pt2]

All I did was ordered a sealed power std. and a full set of std rings. never really gave it much thought . I figured it worked when I puked a piston on an old N/A omni once....
The plug is fouled on 3 all the time and you can see the piston looks wet when I put the scope in the cylinder, no scarring on the walls that I can see usin the scope

[Una]

Bad injector? Could be leaking a set amount of fuel. Enough to foul out the plug at an idle, and enough to lean it out at cruise...

[22dodge]

You may have an out of round cylinder or a bottom end issue. I had the exact same issue with a 1986 lancer. bought the car with a bad #2 piston. installed a good used one. about 1 week later I spun that rod bearing. I suspect that the bearing was gas washed due to the detonated piston allowing raw gas to that rod bearing. even though I properly assembled the bearing and lubed, I think the bearing may have already been damaged and I just didn't notice.

[TurboShadowES]

i had the same problem and it tunred out that i had one rod REALLY out of round, the rest where off by a hair. got those fixed and it turnsover nice and easy now

only cost $3 a rod