I thought the 340 bolts were slightly shorter ??
Seems to me that the 360 are slightly wider and taller but I'm not 100% sure. I do believe I have the main bolts with the provisions for the windage tray. I'll look tomorrow as I'm just about to go out the door for the evening.
Thanks
340/360 bolts are the same length. The MP kits came with the longer 340/360 bolts and 8 hardened washers to be able to use the kit on 273/318 with using 2 washers per bolt. They also had the 4 little bolts with an encaptured washer. Kim