i didnt realsie the BOB manifolds were different either

are the ports the same
i think like me, you have a few options
1. like guy - manifold extentions, but for mine i think they wont look neat enough
2. cut the flange off and weld it back on further back - even if you dont fancy welding it you could take it to any fab shop and it wouldnt be a problem
3. new manifolds - made from scratch - at the moment this is what im thinking of doing, but im a long way behind you - i havent even got my engine in yet. ive looked at a few pics and i reckon it wouldnt be too dificult but probly the hardest way round it
depends on the tools you have how confident you are with a welder and the finish you are aiming for
