I got a 4 brush VMaxstarter off Ebay for my Venture. $60 with shipping.
Came off a 92 with 26k miles on it. Sandblasting and powder coating will clean it up like new.
1990 and newer 1st gen VMax's have the 4 brush starter.
There have been a few questions on here about this starter. It should crank better than the stock Venture 2 brush starter.
Doing the grounding wire mod will be harder to do, since there is not much room on the brush plate to attach the additional ground wire.
Also shown is a stock 2 brush starter brush plate for comparison.
Gary
http://i1007.photobucket.com/albums/af193/gdingy101/DSC00937.jpg
http://i1007.photobucket.com/albums/af193/gdingy101/DSC00936.jpg
http://i1007.photobucket.com/albums/af193/gdingy101/PICT5143s.jpg