It can get expensive to upgrade the 727. I used the A&A Ultimate sprag ($195), Billet Steel front drum ($550), Billet aluminum rear drum ($250) Note this was mostly for clearance with the billet front drum. Billet Steel 4-pinion front planetary gear ($499) The splines in my stock aluminum gear were cracked and falling out. CRT reverse manual valve body with low band apply ($275). That is $1769 to start with. A modified race pump with max lug gears ($315), lightened sun shell ($165), Deep aluminum trans pan ($175), billet front servo ($83.00), 4.2:1 band lever ($25), Billet strut ($19), billet strut anchor ($34), Billet low reverse servo ($48), billet accumulator (), rebuild kit(), alto read eagle clutches and kolene steels(), vent relocation (), Bands (), more stuff I forget...