[Spridgets] More highway speed for a bugeye?

[ryan.kubanoff at comcast.net]

So i have a 74 midget with a 1275, rib case, and a stock rear that will do 70+ on a highway no problem. Last year I bought a 60 bugeye that was modiifed by the previous owner to have a 998 cc motor, rib case and a stock bugeye rear. It has more trouble with highway speeds. Could I swap out the stock bugeye rear for a late model midgets? Would that improve performance? 
Thanks 
Ryan 
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