Use the aftermarket side mount set-up and you'll be fine. I made my own back before I knew about the aftermarket stuff and it pretty much looks just like them. I used a bellhousing from a mid 70's V-8 truck and made an adapter mount to connect it to the crossmember, that way I could use the SM420 without reworking the driveshafts,
Scott
If you look at the links in my signature line, the 48 4400 with the plow on is the one that has the 350 in it for about 8-9 years now.
