This maxed out package features the best equipment available to mill a 44" to 45" wide slab with your MS660
Includes the following: 
New England Pine 48" Chainsaw Mill Kit
New England Pine Winch Kit System
New England Pine Aux Oiler System
GB Titanium Hs50=63RA 50" bar 3/8 .063
2 X Oregon Ripping Chain-156DL 3/8 .063. 
Free 2 x Tecomec Wedges and 1 x 7/32" file kit. 
This full kit ships in 3 large boxes and is ships in under 5 days. Overnight shipping is available.