originally i was toying with the idea of a 4BT, but then changed my mind to put a 4-53 in my 3800, and ended up moving the firewall in about 4." I then had to shift the pedals away from the middle of the firewall (gas pedal was the hardest to figure out to make it comfortably drivable). I'm not sure if the 4400 engine bay is longer, but I found out i could have saved a couple inches using an electric fan, and possibly mount the radiator in front of the support.
Welcome,
Do you have any pictures?
I have a plan for my gas pedal, but it will be moved slightly as well.
4400 engine bay is same size as a pickup's.
I put my engine as far forward as it could possibly be, just enough room to get a fan belt between the radiator support and the front pulley, electric fan is the plan. With it that far forward the firewall indentation is deep enough, but not wide enough by about 6".
Better yet is a GMC truck, I'm reasonably sure the engine can be placed far enough forward to not cut the firewall at all. to start with the firewall to radiator length is longer than the Chevy, and it looks very simple to move the radiator forward another 1.5".
a GMC 2 ton with 4-53T (not mine) is the next project coming in my shop, already have the parts here and measurements look favorable.
Grigg
