Yea, it's pretty easy, you just have to make sure you get the right lower intake. If you have the old heads you need the early style lower, if you have center bolt heads, you need the newer lower intake.
When I did mine I pieced the whole thing together, I didn't keep track of what I spent, but I'd imagine it would be just as expensive or alittle cheaper if you just got a complete system, and it would be less of a headache.
I went thru street and performance for my harness, and a new prom chip. They do sell a complete kit that supplies everything needed to put it in, the complete intake, throttle body, distributor, harness, all the sensors, etc.. I'd recommend them to anyone interested in swapping to TPI, a LT1, or anything else they support.