I know going from a mercedes motor to a chevy is probably a 1- 2 week deal as I will have to build the mounts after removing the benz mounts but once I get a chevy motor in and bolted up ect it should then be the same routine as chevy to chevy, just the first leap that takes a while. Basicly what me and my dad have agreed on is, we'll test the car with the 267, get the speedo fairly accurate ect, then out comes the 267 in goes the 350. When we are bolting the 267 up there will probably be a 350 on a stand right next to the car. I must say you are very observitive as you knew i played hookie today but last friday when I first appeared on this site our school was closed due to the extremly cold weather and the busses wouldent start. I WILL use a 350.