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Idk if you guys can help with a few things if or even if im posting to the right place but i have a 93 k1500 i just got it 2 weeka ago guy lied to me but has a newer motor its a late 80s 350 small block tbi i got it knowing the timing was way off was back fireing out of the intake so got the timing close couldn't put a light on timing marks are messed up but its close number 6 cylinder is not fireing all the time i put new plugs ect in all ac/d i did a compression test it had 160 you can hear it miss at idie big time but when you hit the gas it goes but doesnt seem have the power of a 350 i cant figure out the miss new egr no vacm leaks