RE: Best Kit for First Build
Just wanted to say, "good choice" on the Sig kit. Be warned: once you build a Sig kit, especially one of their updated/modern ones, you will be spoiled!
Also, allow me to recommend the O.S. .46AX for your first engine. More power than the .46LA, and with proper maintenance will last longer than the LA model. I have one (its my only 2-stroker) and swear by it. Great idle, lots of power, very reliable.