g,day fella,s greetings from tasmania. i,ve got a rebuilt 454 short motor casting no 361959 to put in my boat it came with a pair of reco oval port heads casting no 10114156. i have been told this combination won,t work and as this is my first big block i,ve no idea why . can you blokes tell me why or are these clowns down here filling me up with shit. cheers big wad