update .... update
My 273 commando is still running strong . seems to get fast and faster every year with more miles put on it .
I tried tweaking a couple afb carbs for more power but the one carb that really turned the 273 commando on , was a holley dp 700 carb . It just loved it in All rpm ranges . I jetted down a couple sizes on each end and it loved it . throttle response is awesome and the top end power pull is just a rush. it screams ! haven't taken it over 5900 rpms yet , cam peak power is 6400 rpms . just keeping it there so the engine last longer .
