Ya "learnt" me something too. My only reference for '62s is a Motors Manual and they show 261 only in 2-tons and school busses.
Lake Jackson, huh? Well that narrows it down to Texas, Florida, Virginia or Ohio.
By the way, yes it was definately a lucky day. You must be doing something right.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.