Im new to this site so id like to say hi to everyone here... but I have a 1968 Camaro and i want to fit a beefy overdrive tranny in it.

first off how much can the 4L60E be made to handle? how about the 4L65? or the 4L80? also what kind of gear ratios do they have?

what is the phyisical size of these trannys? do they compare at all to a TH400?

thanks in advance..