I seem to recall that my first van, a Dodge, had a slant six. Good mill! That van was surprisingly quick!
I think it was back in the early 90's that I saw a write up in one f those hot rodding mags where a guy had built a Hillborn injected, turboed, 225 slant that would run tens in the 1/4 mile.
It really was a nice little engine. And just about bulletproof as well.