Re: Ford 300/6 ???
My understanding is that there are differant 300's. One that was used in light duty pickups and an industrial version that was used in medium-heavy duty trucks. The stock industrial version is supposed to pump out right at 170 horses (which is only a few less than the 330 FT). There are many aftermarket parts available to boost the horse power with out losing the low end torque. The added advantage, as I understand it, is parts availibilty and cost, not to mention slightly improved gas milage.
I have lost contact with a guy who knew all about doing this swap... he lives in a skoolie in Alaska and is very knowledgeable about these old Ford buses. His computer went out so he hasn't been available for a couple or months now. I learned more about my bus "Olde Skool" from him than anyone.
One of the guys at fordification.com went up to visit him. The gentleman is doing fine, but getting a new computer just isn't very high on his priority list... Hopfully he will come back online soon, or I will run into someone else who knows these old Ford buses.