help!!!!79 suburban

[jims72]

Just bought a 1 ton 4x4 suburban 350 4bbl sm465 4speed. The thing will not accelerate engine rpm in gear or not without bogging down and it has a knocking mixed with a ticking sound coming from some where. It will also at certain times pops out of the carb and starts running really rough and then just fixes itself for a bit. I have replaced the carb with a new eddy 1407 and the timing chain with a cloyes double roller. I thought it could of been a rod or wrist pin but after pulling the pan there is no evidence of either shown. The flywheel is not cracked either. I just bought the thing and its my only car right now and could really use the help on identifying what is up with it. I have been allover the engine and the only other thing I could think of was a bad HEI which it does not have [just now checked]or a bad fuel pump [it does deliver fuel still but is it enough and is it my knock?]. any ideas or pointers are appreciated! I have officially confuse 5 master techs with this truck as well 2 being mechanics at a gm dealer!