Manual Valve Body, best one to get?

If you need to use 1st gear to get up to speed or under competition get a valve body WITH "low band apply". If you can run with just using 2nd and high gear you can use a valve body without "low band apply" and just lock out 1st gear on the shifter to be safe. Valve bodies without "low band apply" will have no engine braking in 1st gear and run the risk of locking the sprag and blowing the rear drum apart, this is more common in the 727 than the 904 but is still possible with the 904. All the potential for catastrophic transmission damage happens in 1st gear with a valvebody without low band apply, 2nd and high are the same with either style manual valve body.