[DirtyLarry]

I have personally not done this or known anybody that has but I bet if you use the GEN III engine mounting brackets from a 2004 or later Workhorse P42 commercial chassis (Step-van chassis) with either a 4.8L or 6.0L they might be a perfect fit with little or no modifications. GM sold the P-Chassis strip chassis division to a start up company back in 1999 called Workhorse Custom Chassis. The Workhorse chassis has been the same basic strip chassis as the older GM chassis up until 2006 when Workhorse introduced the W42 commercial chassis. Many of the P-chassis components are common with pre-1987 pickups.

I am pretty sure the engine mounting brackets would work as the forward portion of the P42 frame rails are pretty much identical to pre-1987 pickup frame rails. When Workhorse started using the GEN III’s they dropped IFS and went with I-beam across the board for commercial chassis due to engine interference issues with the IFS engine crossmember. (P-chassis used the same engine crossmember that was used in Pre-1987 pickups and G-vans) I don’t see why the P42 engine mounting would not work in a 4x4 pickup for this kind of swap. Maybe you can be the first guinea pig to see if it works.

If you are interested in being a guinea pig, let me know and I will PM you more details.

There are companies that make a complete VSS & speedo cable assembly so you have both a VSS signal and can still retain the factory speedometer cable to operate the speedometer. Turbo City is one of them.

Hopefully, this picture of the Workhorse engine 4.8 and 6.0L mounting will work………..