“Mid-1950's through early 60's school buses are a good source for 261“
That is exactly how/where I got the 1960 261 that has been in my suburban since 1972.
The rings were 0.060 over (barely rebuildable) : $200 back in 1972 - Leon said he was giving me a good price.
Good luck findIng a good one in an old “dismantling yard” - they got sold fast.
