I have a 55.1 AD to which we added an Independant Front Suspension kit from Chasis Engineering. (Great product, everything fits beautifully!)The transmission crossmember came from them also. My underfloor mastercylinder/power booster system came from Chevs of the 40s (part no. EC505.) There was an interference issue with the crossmember which required that it be modified. At the interfenence point we cut about a half inch valley out and then welded in another piece for strength. I'm not a welder so my body guy did it for me. Quick and inexpensive, everything lines up great! (We're using a 327, however...)
