hey i have a 350/350 chevelle and am putting a 454 from an 82 suburban in it but the pan does not allow enough room for it to slide forward so i can use my 350 mounts both for thge frame and the block! do i have to have the pan for the 71 454 to work? and if so will it bolt right up to the 82 motor ? or can i cut the pan in the deep section to make it smaller?