Exhaust manifolds on my 273
If you don't find the magnum manifolds,BEWARE,The 273 manifolds will need to be clearanced at the back on the drivers side,the downpipe will hit the boss for the a.i.r. port be cautious,the boss on the head is very thin and those manifolds are fragile,use double gaskets to help with the clearance issue and some careful grinding.Good luck!