i would like to put a 5 speed manual box behind a 285ci ford flathead in an A coupe. i've noticed that most flathead powered cars run a S10 gearbox. in australia we never got the s10 pickup. what's the main reason for this being so popular. where do i get a gearbox from & is there any particular model i should be looking for. also what clutch & flywheel do i need to look out for. thanks Phil.