I installed a set of tom's lumps in a head last year just to do it. Watched his video on u- tube, bought the tools on eBay, and redid the head. Yes, I used the sawzall method, lol. It was great fun, I learned a lot, made some mistakes but it all worked out in the end. I did use some jbweld on the floor of the intake port just before I set the lump in, and on the sides to fill in the gap. Polished it all up. Don't know how it will run, have to build the rest of the motor now.
