I gathered the parts to install a 6.4 crate Hemi into a 68 Coronet wagon, so not a light car. I am going with the Holley Engine Mgmnt System. For the trans, although Holley has the ability to control the 46RE (extra harness purchase) I went with the A500 for the better-for-me gear set (2.74, 1.54, 1.00 and .69) I am replacing a A904 so the kickdown linkage can be re-used. I had the A500 built up to handle the extra HP/TQ. I purchased a Billet Lockup Converter from Edge Racing Converters. My swap wont happen for a while but I have all the parts I can think of without the engine/trans in the car. I have to admit, Holley seems to have nearly everything necessary to handle the swaps.