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I have his post copied in my build thread

When I was researching modern turbos for the multifuel the turbo map from a hx35 fit beautifully to get the engine up to over 200hp. With a better cam profile the potential should be a little higher. I'd be concerned about reliability past the 200hp mark.

The block is not the weakest link in the multifuel when it comes to making more power. The head bolts and head gaskets is the first mechanical weak link to go. Turning up the fuel to match the maximum efficiency of the turbo (low-mid teens for boost from the C and D turbos) would be a great...

Might be able to have it machined for a larger diameter plunger.

White made the 465 as both a multifuel for the military and a diesel only for tractors. The turbo, pistons and head are different. Lower compression ratio on the diesel only model (18:1 is what I read).

Could get a custom cam ground, probably 300-500 bucks. To get the most out of a better cam the turbo needs to be swapped out to a more efficient design and less restrictive with exhaust flow to reduce the EGT's. Since your stated goal is another 30-40hp it can be safely done with the LDT...