Welcome Duce.
These guys know their stuff, I have built my 250 with the insight of several members as well as good used parts that have been listed in the classified adds. I have a 73 GMC pick up with a 250 motor, Clifford intake and exaust, bought from the classifieds, HEI ignition, bought from the classifieds and a NEW Holly carb and Comp cam. Reading all, or many of the postings has been a big help and saved me lots of time and money in "trial and error" building. Stick with the 250 she is a good little motor with a big hart.
Good luck
Desert Dove