New owner of a 1976 Plymouth Duster

Welcome.

I personally, seeing as how the car is going to be built for the street, would go with a small block, but thats my opinion as never having driven a big block a body. I am planning on building a variation of the 318/344 stroker BJR racing has a thread on building and backing that up with a 5spd. But forget about me, what is your first interest in the direction you want to take for this car?