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To bullet prof a TH400, your looking at a direct drum with super sprag $680, plus billet input shaft $300, plus all the other normal expense.
Almost forgot about billet intermediate shaft $230. Just as expensive I think...
Allan G.
you only need to change the sprag in a turbo 400 and it will handle 1000hp and live on the street.
Intermediate shaft will break at 1000HP. It is not that expensive to replace with a 4340 piece. Front drive hub will most likley fail as well. Another inexpensive piece. The Input would by on the edge of stripping out of the drum.
1970 Challenger w/572 Hemi street car and my pride and joy.
1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno.
1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
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