Update on the 261 engine swap and McCulloch supercharger on my 1958 Apache, I am happy to report that everything is up and running and I am very happy with the results. Before I pulled the old engine out I did some performance runs with my G Tech meter so I could measure the difference. The old engine was painfully slow and averaged 21.88 seconds from 0 to 60 MPH. Of course the truck is heavy at 4160 lbs. and has the aerodynamics of brick. When I made the same runs with the new engine and supercharger I thought my G Tech was broken. I made about 6 runs to make sure it was right. The modifications knocked 10 seconds off my previous times for an average of 10.83 seconds. Not fast by any measure, but at least I can get out on the Interstate without being in the way.
