so we decided we wanted to do a duramax swap on an old farm/plow truck that we had sitting on the back of the property. we think its the perfect candidate seeing as it is extremely rusty and was free. we started by finding a doner truck. the truck we chose was 2001 extended cab long bed 2500hd that had 190k on the odometer and was in a roll over so no roof and the front end was destroyed.
we paid 900 including the tow to bring the turck home we stripped the front end and cab off the frame. we picked the engine and trans out of the truck. the initial plan was to use the transfer case in my daily sell the trans and use the engine for our swap but we last minute decided to build the trans in my daily and found a cracked case and ended up using the trans from our donor to build for my other
truck. once we had our drive train we pulled out our truck we wanted to swap. the truck we are using is a 1978 k20 single cab camper special with auto locking hubs in the front.
we started by pulling the plow mount off the truck. right afterwards we had the engine out and on its way to its new home. we got the doner lb7 striped down and ready to drop in making our first set of mock up motor mounts that are going to be replaced with a lot beefier set of laser cut solid mounts and a new trans mount. we decided to use the th400 as the plans for the truck is to run 1/8 mile 7:70 class and to daily it on occasions. yes we know we could run the allison but floor board fitment isn't the best and eventually we want to work our way up to 5:90. we decided instead of sending the wiring harness out and spending $700 to $1000 on having our harness cut down and made into a stand alone harness to just do it ourselves. so far it has been a pretty easy process. we currently have the trans harness and wires along with the ac, dash, and a few other misc wires cut out of the harness. we will do a full break down on what we used and all the wiring diagrams along what how we wired in our fuse block
