A-518 Who has put one in an A-boby

just picked up my tranny on Friday, looking to do most of the work this weekend! I did not realize the 518 is 7" longer than a 904. Will a 727 yoke fit the 518??? Also i have a 73-74 360 and was wondering if the flex plate was irregular or regular??? thanks!
Grant

Yeah it's a bunch longer. I do believe a 727 yoke is the same and your 360 is externally balanced so you'll need a B&M 10236 or equiv. flexplate.