I see some guys running 8" converters on the street but with more gear then 3.55's. Myself I use a Dynamic 9.5 street/strip converter and like it alot using my 4.30's and 30" tall tires. I know my brother threw an 8" converter he had laying around in a mild 484 cammed 383 Duster. It had 5.13's with 33" tall tires and ran 12.0's @ 111. It was basically an all wrong converter for the combo but its been living in the car for a few years already and drives ok on the street. It works much better then we thought it would. Funny thing is my buddy bought the Duster from my brother and dropped my old 440 in it now and it seems to work good with the same 8" converter still in it that is listed as a 5000 stall. Ron