Junkyard find

[83_200e_rider]

Found this at the junkyard the other day looks to be a 350x engine in a 250x frame. They want $140 for the engine alone same price as a car engine. I seen it on my way out so didn't get to look at it up close. I never seen the head pipe this one has on a 350x does anyone know if it's aftermarket or homemade?

[big specht]

I'm pretty sure that's the head pipe used on those converstion