Good job, keep us posted it's very interesting. I rebuild my 1965 273 commando 4 years ago with a 1972 340 crank and .030 over piston and stock crank balancer. No problem with the converter since it's a 4 speeds car. The car run good and I put a lot of miles on it during summer time. Is anyone know if someone make a performance intake for 273 with the odds angle bolt.