Mike Rapoport wrote:
When I read about Lycoming engines the terms "wide deck", "narrow deck",
"straight valve" and angle valve are used to describe different
cylinder/case configurations. What is the GO480 in my Helio Courier?
Narrow deck? Wide deck? Angle valve? Straight valve?

The deck refers to the flange where the cylinder meets the case.
The valves straight/angle indicate whether the two rockers are
parallel to each other or form a sort of V). I don't know about
the deck, but I think the Gopher's were all angle-valve. The
wide deck engine serial numbers end in "A".

Intresting information about all this can be obtained at
www.sacskyranch.com.

My condolences on having the gopher80. Getting rid of mine
was a big improvement on the Navion.

-Ron