oldseabee
Senior Member
668 had 504 Cummins, 668C had 555 Cummins. 667C had 378 V6 Cummins as option.
504 would be a tight fit (V8), probably have to move engine mounts and get shorter drive shaft or push the front end out a little. Trans and convt are the same in both machines. 668 and 668C had bigger axles and bigger Rad, could have heating problems and depending on tire size and ground conditions, could have axle life problems. You might try the "Forestry Forum" for more info on operating. Link below:
http://www.forestryforum.com/
504 would be a tight fit (V8), probably have to move engine mounts and get shorter drive shaft or push the front end out a little. Trans and convt are the same in both machines. 668 and 668C had bigger axles and bigger Rad, could have heating problems and depending on tire size and ground conditions, could have axle life problems. You might try the "Forestry Forum" for more info on operating. Link below:
http://www.forestryforum.com/