I have a 47 - 45 flatty with a 21 over front end with 3 speed w/reverse servi car transmisison. I just split the cases and all new bushings cams the whole bit. hat 45 restoration is where i got all my stuff and there used to be a guy in Santa Fe,New Mexico named David Sarafan i believe where I got some of my engine parts. I think that frt end I have weighs more than the rest of the bike. Good luck and have fun with it .They are not fast but when you roll up to the local biker bar and watch everyones jaw drop you are the baddest mo fo there on a flatty. I just sold 59 panhead all 70's choppa.... I am stepping away from the bike thing a lil bit and now working on a 24 ford t....Sinners-AZ.C.C.......