You may want to call ABS 714-771-6549 in Orange, CA before you remove the existing box. They rebuild these components
and can probably quote you chapter and verse about the problems with CPP stuff. It's possible that CPP sends their problems to
them because they are close by and know what they are doing.

Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine