Ok I have gathered some information regarding my rough idle situation

In no certain order

I ran the engine with rough idle and it lasted seven minutes before stalling out.

While it was running I put my hand in the white smoke exhaust out of the tail pipe and I got water and black specks on my hand along with white smoke and some bad smell.

I found the engine stamping under the exhaust manifold and behind the motor mount - it reads as follows:

B230 890809 (then a symbol that looks like a backwards Pac-Man) then 13

My Jetronic computer stayed in the car from the old engine and has this number on it:

Bosch 0 280 000 951

While running this time it fired a CEL - 1-1-1 in port 6 and in the 2 position ... the code read 1-1-3 indicating fuel mixture to rich /lean.

I am 65% sure that I put my old engine's EGR into the engine that is now in my car which would suggest this engine probably did not have an EGR valve before I cleaned it and painted it.

I'm not sure how to find out what year engine this is from my stamped block number (maybe call a Volvo dealership?) but I know I put a new ECT in this engine and the new ECT was purchased for a 1990 Volvo 240 from FCP Euro.

Next I'm gonna try to figure out how to tell if I have strong spark or not and maybe disassemble the intake and look for air leaks on all the hoses maybe swap out injectors to make sure one is not leaking.

This is quite the detective job and I'm certain I'll be finding a stupid mistake that I made

Thanks Phil and everyone else considering this conundrum!
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2 1990 Volvo 240s - 1 is my son's sedan the other my 245 in restoration, 1 1999 S70 is my current daily driver until I can get back into the 245!