tatkin, I take it your Winnie is a gas burner. See if you can advance the spark timing some (without getting spark knock!). That should get you a little better gas mileage.
Also check the vacuum advance canister on the side of the distributor to make sure it is not leaking. Lack of advance just kills mileage.
When I worked in a speed shop years ago, guys would ask me how much timing they could run in their hot rod. I always said that they should advance it till it either spark knocked, or was hard to crank over when completely warmed up. If either of those two happened, just back off a little and try again.
Hope this saves you a few $$$.
