big mike, it all depends what you as the end user wants the boat for. lets be realistic the boat is how old? it has ran like that since probably the mid 70's and i assume that it still runs? so if you want it just to cruise around and NOT race or hot rod it will serve you well. just dont expect to go over 50mph, as for the panther pump get ahold of Tom at jet boat performance there is a link on the home page. he has done a lot of work on those pumps and is verry knowledgable about those pumps.
however, you are allready talking about a motor swap and pump swap so if this is the plan DONT bye it there are much better boats allready set up with berk's and big blocks. just my .02
ralph