It's a really simple and everyday swap like a b series in a civic. Up here anyways, everybody and their brother has had a blocked dime. Cept me I threw a 351 in my ranger
A friend of mine and I have done this swap several times. Make sure you got a big enough radiator, your probably going to have to do something with the core support, or use thin electric fans. Would be so much easier if that truck was a 4.3. You could use the stock mounts and trans
Are you meaning a 305? A ford 302, or a DZ chevy 302?
Aside from the Driveshaft issue, you could have this done in about 5 hours or less with some competence.