Chevy High Performance 350- Fit or no fit?

[Theoriginalsilverado]

Hi guys, I'd like you to check out the link I have posted below. I probably never will purchase another motor for my old 1975 C20, but I would certainly love to. One of the best replacements I've come across so far is straight from Chevy, and for a good price.

It's a 350 with 290 HP. All the Dyno specs are listed, and it seems to be a really good motor.

My question, is will it fit our trucks without any major modifications? Specifically a 1975 C20 with a stock 350?

You can view the motor at THIS LINK--> http://www.chevrolet.com/performance...-hp.html#parts