Yup.. the chassis is legal, and that's a legal engine from the same manufacturer..

So Greg.. here's a kicker for you..
Quote Originally Posted by Nov 2011 GCR, sec 9.1.4
D. Engines
1. Engines up to 6 cylinders and 3000 cubic centimeters factory
displacement are permitted, plus any others listed in 9.1.4.2.G.

[snip]

4. Compression ratio is limited to 12.0:1.
What's the compression ratio of a diesel engine? Maybe this should be addressed under E&O??