I have the Victor Jr and I have no experience with the GMPP. So the Jr is the only one I can comment on. I went with the Jr because it's a little shorter for cowl clearance. Through all of my searching before I bought mine, I never found an answer to which one is "better". It's really which one is better for you.
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9.670@138.98 3400#
1998 Camaro-LS2, VA speed spec'd 2xx/2xx 6xx/6xx 109, TFS 225's cnc'd & milled, Yella Terra rockers, Victor Jr/FAST 4150 TB, 1 7/8 TSP LT's, Cheater plate, Yank lock-up TH400, Yank4400. Moser 9" narrowed 6",4.11 gear, Madman TA, QA1's front and rear, Weld Alumastars, 275 MT's. | 
Vic. Jr or GMPP 
