Questions on 344/349 build.

Find a 360.

If you think 360 stuff is expensive, unless you can do the machine work, wait til you see what it cost to do what you want to do.

KB107 pistons aren't expensive and everything for a 360 is about the same cost as a 318.

Figure what you want to run for et/mph, know what your car weighs, and build the HP to make it happen with your budget in mind.