350 six way blade

[Paul45]

Hello, just bought another 350 dozer. by the serial # its a 1965 has a reverser and six way hyd. blade and tee handle controls. this machine has a longer track base then my 1966, 5 rollers and an idler.
could someone tell me the differance and which one they think is better? also will the blades inter change? Thanks for your input.

[Lavoy]

They were available with 4 or 5 rollers, all 5 rollers had an upper idler. The 5 roller crawler will have more surface area for flotation, and has a longer footprint, so will be more stable. 6 way blade on a 4 roller would be a pain I would think, too tippy.
Lavoy