is the new engine complete from top to bottom? if so i wouldnt worry bout it but if ur swapping stuff over you might wanna call a ford dealorship and ask them although they would probably tell you to bring it to look at it 
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1998 mustang gt/manual..373s,bbk offroad h pipe,flowmaster cat back,c&l 80 mm maf,steeda triax,eibach springs,steeda ud pulleys,upr timing adjuster,screamon demos coil packs,motorsports 9mm plug wires,steea aluminum lca's,steeda heavy duty uca's and just over 100 k on the clock
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