i'm confused

ok, not sure where to start but: i bought from a neighbor the original engine (or so i thought) out of a 68 camero..it was his aunts car from new...327 210 hp....gave the engine to a speed shop to rebuild...they had a set of 194 valve double hump fuelie heads which they redid with hardened seats...they put a 350 hp cam , new pistons, etc in the car and reused the 327 crank..use middle grade pump gas..car runs strong but were having overheating problems which are now 90 % fixed...was at a car show today and an friend told me that the engine was not a 327 but was a 350..upon decipering the codes it comes out to a 74 350 from a police car....the speed shop said that this changes nothing..i have a 350 block with a 327 crank so i still have a 327....they bored it .40 over...should i be concerned or am i reading more into this than i should be...i was always told that a 350 block...the water passeges were closer to the cylinders than a 327?????? help me undo my concerns....please.....