Im going to buy a 350 430hp motor you need a tranny want 350 but do you need a high performance one plus you were told to keep RPMs at 25 or 2600 RPMs how do you go about cooosing one?

Im going to buy a 350 430hp motor you need a tranny want 350 but do you need a high performance one plus you were told to keep RPMs at 25 or 2600 RPMs how do you go about cooosing one?
2600 rpms are very low for a gasoline engine much less a highperformance engine. if it was me, I'de find a turbo 400 transmission. They are a lot stronger. They were common in pickups and stationwagons. they should also cost about the same to have built.