Go with a 261 then. It will "bolt right in" with all of your 235 parts/acessories.

Patrick's could help with GMC 302 info, parts & service.

With a 292 some of the V-8 parts may work as they were an option that year as 'Tig' suggests.

Good luck. \:\)

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon