Welcome to TM. I have not driven any Morgan with Suplex so can't comment on that where as others can.
The 4/4 is lightweight at the front compared to some of the larger engined ones. I fitted brake reaction bars that had the effect of triangulating the suspension at the front bracing it more securely and found that for £38/pair and an hours labour to fit very good value as it tightened up the front end and improved braking and handling.
