the 261 was offered as an option for the 1/2 ton truck for the first time in 1962. It was option code 293 which was still on the firewall of my 62. The engine and bell housing were a light green and the timing marks on mine were a vertical line, a triangle (used as a reference to measure valve lift) and a 0 stamped into the flywheel, which is TDC. I have the factory shop manual which states such and a repto brochure and RPO code sheet which shows the 261 as an option {code 293}. It makes sense as they were probably trying to ,ower their inventory to make way for the 1963 230 and 292.
