A few months ago I got a 261 out of B.C.Canada, the serial #'s are different than the 235 examples I've seen. Casting # is 3769717 so it's a'58-62, but it has the smaller oil filter ports so thinking it's a '58-60. Below the casting # is an M with a raised box around the M, farther back on the block in the casting is F 11 0 with a small 3 above the 0. Driver's side stamped into the pad is W-9 242838... Be thankful for any I.D. help... Dyno Dave
casting date F 11 0 means June 11, 1960. That's probably all I can do for you, I don't have any books with Canadian numbers.
Jim, thanks for your reply with the date. I was told by the seller that this is a truck engine from the states. I'm beginning think that since the 261 build numbers were far less than than the 235 passenger/light truck production that a simple engine serial number was adequate for the 261's... What to you think ? dyno dave
the stamped number looks nothing like you'd find on a 1960 chevy truck engine in the states. It would be something like F0602G or something similar. The first letter is the engine plant, either V, F, or T
AFAIK the Canadian 261 never did get the full pressure, full flow oiling system. The small lines bypass system was used to the end of production.
Jim & Rusty, thank you both for I.D. info. Looks like my 261 is from North of the border... It does have the small bypass ports. I was thinking using a Comp cam with hydraulic lifters, so good to go... Dyno Dave
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