Turbomustangs.com has about as good turbo info as anything out there. Take an evening or two, read the FAQs, & search a little and you'll get a very good idea of how to pick the right turbo, what donors have it, & a good price to pay. The rest is mostly simple engineering, well within your bounds & capabilities.
On the other hand, they tend to devour people who go on & ask questions in their 1st post like "I have a 351C, tell me exactly what I need to do to turbo it!" It seems a little harsh to the newbie, but I think it's actually a little kinder, in the sense that turbos aren't a bolt-on proposition (unless it's OE, or a common kit app.). Education is a good thing.
The book Turbocharging, by Hugh Innes, is also good, if a little dated now.
Another thought, which you might already be aware of, is the Nissan SD33 diesel, turbo & NA, available in the later Scout IIs. Normal IH parts sources like Scout Connection & Super Scout Specialties usually want a small fortune for them, but they are cheaper from private individuals.
I've always wondered if the regular Nissan diesel as installed by Nissan is exactly the same. Someone told me that they weren't available in the US then, but I've not been able to confirm it.
The only thing I have against the IH 4 cyls. is that they're so durn heavy for what they are. OK power, but much too much iron. Of course the 345 is an engine stand breaker too.
Could also look at using a 2.3 Turbo Ford...?