The oem unit properly rebuilt is more than adequate...............it powered not only the cobra's but just about every type of vehicle (sedans, dump trucks, etc.) for 40+ years............. I raced these cars in the late 70's..... although the higher end units today are better, there was absolutely no enhancement IMHO with the majority of R&P units used in racing back then.
and unless you are going with wide tires, even the girls had no problem parallel parking these coupes...IMHO, if you really need an assist unit, then look at adapting one of the electric assist units...easier, simplier and effective.
Member: Never trust a person over 40 who drives a Chevy club
Flatheads ain't so bad!
Certified backyard mechanic I & II