The K, C, or F pipes will likely fit fairly easy but the back mounting hole will move around some, you would have to improvise a modded bracket to match the slightly different points in space there. A few have middle mounts that mount to oil pan, you can get away without using them. Fit to the head will be perfect on all. Don't use 900 stuff though, 750 DOHC only. C ones should be really close.