I bought a 51 GMC COE, see my other post with pics if interested, it supposedly has the 270 six. I do not have much familiarity with these engines, besides to know that the 302 is the more desireable one. Can anyone provide some resources to learn about them and help me decide what to do with it? My engine has a 4-speed compound low trans. Is the bellhousing pattern same as the Chevy 216/235/262 series? Is the bellhousing able to swap a newer style or OD type trans such as a Muncie or T-5? Is the 270 six even worth messing with? The engine currently has an updraft carb and intake. I am planning to replace the engine in the COE with a V-8 with more power and size. So my question is really whether this 270 six engine is worth keeping and what potential use for it in a future project. Thanks for any information and help.