the link is re tune up specs, Doug - the cap you want is a zero pressure item, not common but in the dark past I did get one from NAPA, otherwise a post in the parts wanted will likely find one .... or you could check into getting the fill neck changed over to newer style so you could use a 4# cap

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics