Thanks guys. It is a 261.
Ed, thanks for recommendation for the head. I’ll work on that first.

It’s just me, so I was planning on using a pry bar (short ones) on each side of the flywheel and work it back and forth until I get movement. I would avoid putting too much force on it; don’t want to break a tooth.

Do you have any recommendations?
Thanks
Victor

~ Victor
1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery
1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD
1957 3100 - moved on
1959 C4500 Short Bus "Magic Bus" - moved on
1959 G3800 1 Ton Dually "Chief" - moved on
1958 C4400 Viking "Thor" ~ moved on to fellow Bolter