I have a 55 2nd and used the TCI M2 frontend.I understand Heidts,and Fatman are also good setups.Very important to follow the measurements on the instructions.I had to send one Email to them concerning the power steering hookup.They use,or did a few years back a power rack and pinion unit from a Thunderbird.So by me using a GM pump, I had to put a pressure reducung valve in it.The TBird units operates at 7 to 800 PSI, whereas the GM pump puts out about 1300 PSI,which would blow the seals in the TBird unit if the pressure was not dropped.I also used the TCI rear suspension package,which consisted of new 5 leaf springs, spring mounts and shackles,shocks and mounts.Also flipping the rearend.I had good luck with both setups from TCI.Whatever you buy,make sure to follow the instructions. I am also runninmg a 350,and 700R4 trans.which works out very nice with the stock 3:90 rearend.Hope this helps you make uip your mind.