How- to: Modifying the firewall for Caddy engine clearance in a 4x4

[jeffspower]

If you want to put a Caddy engine in a 4x4 without moving the transmission forward, here's how I do it. This is what i have found to be the easiest way. Moving the engine forward creates it's own problems (engine crossmember has to be moved forward, "big" oil filter won't clear, exhaust manifolds won't clear the frame rails with the engine positioned correctly for the fan shroud, etc). with the engine in the "stock" location, you can't use the mechanical style gas pedal. There isn't room to clear the cylinder head. Even with the cable- style pedal, the three nuts welded to the firewall won't clear the head. The first one I done years ago, I just hammered that area down about 1/2" and cut out the clutch rod hole & welded in a pocket for head/ exhaust manifold clearance. Even with a 3" body lift, it won't clear without doing this. This time, especially since I'm using a '69 cab, I am going to remove the pedal area & recess the area another 1/2". This will also give me a clean slate to install the gas pedal just where I want it.

I can see where this same mod would work good for a BBC or diesel conversion.