NOT Q's

well I can tell you this they are not Q motors which may be a good thing as you can use normal 350 parts like intake manifolds. From the mid 80's my guess is they are G or K series motors but I can't be sure if so then about 255 HP good engines and I see you have FWC with the heat exchangers nice but if I remember correctly you are on the Great Lakes so you dont really need that but it is nice to have the anti corrosion properties of anti freeze running through your motors. Am I correct in assuming yours are a repower? As in not original motors? If so then your guess is as good as mine but I do have a copy of the 350 G and K series owners manual and parts list and for a slight fee of Office max costs I will have it copied and sent to you heck if its cheap enough I will just send it to you like it was sent to me. Get you rserial number off the motor and let me see if it matches up to the stuff in the manual.