I am not building this engine. It was just a thought. I have a 71 Demon in storage. I can tell you that when I was active in the car hobby I drove my car 5 months out of the year- under 1500 miles in that time. No strip time just fun street blasts, cruises and errands. Thats why a poor mans stroker is appealing to me. I read the smog pistons are perfectly fine for max 5,500RPM. The chevy grind cam- like a Comp Cams magnum 290 has a lift of only 501 but duration of around 245. Goal would not be to run 10s or 11s but a super torquey RELIABLE beast of a STREET ONLY engine. I live 40 minutes from Martin Dragway but even when I was driving a car I just never made it there. (Demon is in storage until 12 year old daughter turns 18 and some money is freed up)