The information and photos are for Canadian engines. Note the "M" cast into the block. This applies to Canadian Chevy and GMC trucks. If you want a 261 engine with solid lifters look for a 1954 to 1962 Chevy large truck or bus. All GMC 1956 to 1962 trucks came with 261 sixes. (including 1/2 tons). If you want a hydraulic lifter 261 engine find a 1956 to 1962 Canadian Pontiac six. Look for the captain bars and use the same engine codes as the USA posted casting numbers
