2014 pro star

Extremely illegal. You can only go with a newer engine than what's in it. And honestly that truck isn't worth the work.

 

Can you site the law you're referring to? I've never heard of such a thing and can't find anything online about it except glider manufacturers.

 

It’s a EPA reg the motor needs to meet the emissions standards for the model year.
@Heavyd may be able to tell you how much of a pain it will be.

 

I'd definitely like to read the actual law/statute concerning the issue.

 

No because Gliders.

 

A rebuilt engine or other used engine may replace a certified engine in a piece of equipment only if the engine was built and/or rebuilt to a certified configuration meeting equivalent or more stringent emission standards. Note that a certified configuration would generally include more than one model year. A rebuilt engine being installed that is from the same model year or a newer model year than the engine being replaced meets this requirement. The following examples illustrate the provisions of this paragraph (f):
https://www.ecfr.gov/current/title-40/chapter-I/subchapter-U/part-1068/subpart-B/section-1068.120

 

That's a joke and completely up for interpretation. It's pretty much unenforceable at a scale house. I would never put that engine in a disposable truck like the OP wants to do but if I did I certainly wouldn't let vague Fed interpretations stop me.

 

As far as I know it would be up to someone with the EPA to enforce it.
I don’t know enough about these new trucks to say how much trouble it would be to swap motors.

 

you would never ever be able to take it to a dealer for any repairs....