That's a truck engine and will have 2 notches in the bores. The 702 head has exhaust rotators and has smaller valve diameters but no combustion chambers around valves. It can be modified for bigger valves but you still end up with small intake runners like the 379 car heads. It is also the only 348 head I know of with a distinguising mark on the end of the head like the small block heads have.I have a complete 348 , block,3755011 date code B2460,intake 3770083,water pump 3782760, dack stamped T03307TF,exhaust3755780, HEADs B1660 3764702.?? I have no info on heads! what are they? any good? engine looks good , is it worth building?