The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Exact frame measurements needed for converting a longbox truck to shortbox

**Captainfab** · 06-13-2015, 12:06 AM

The best place to remove the 12" is under the cab. just a little ways forward of the rear cab mounts. This also allows you plenty of room for the reinforcement plate on the inside of the frame. Then you just have to move the rear cab mount brackets 12" back. And of course trim 8" off of the back of the frame.

06-13-2015, 12:06 AM	#9
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,254	Re: Exact frame measurements needed for converting a longbox truck to shortbox The best place to remove the 12" is under the cab. just a little ways forward of the rear cab mounts. This also allows you plenty of room for the reinforcement plate on the inside of the frame. Then you just have to move the rear cab mount brackets 12" back. And of course trim 8" off of the back of the frame. Attached Images __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE Last edited by Captainfab; 06-13-2015 at 12:12 AM. Reason: added pics