welcome to the board steve ! it looks like you have a good starter project !i think gene has a good idea using a fabbed chassis, or a dak based one, due to the torque issue of the v10. the weight of the motor/trans combo should be the same, or possibly a little lighter than the flat6. also, a modern rear will probably be a few pounds lighter as well, because those original rears were heavy too. keep us updated on your progress !