I have 3/4 wraps on my 361 and 460...and if anybody has one for sale, I'm currently looking for a 3/4 wrap for my 660, but just for looks mainly. Being a firewooder, I rarely fell anything that needs a 660, and if I do, I spend the day listening to my buddies cuss me because the rounds are so heavy. I cut mainly black locust and red oak and some other stuff, rarely up to 60-80" across, but usually less than 30" and much of the locust is around 20".
Wraps need to be thought about in terms of usage. We all know they look cool, but they do add weight.
I'm the main faller for our weekend firewood gang and I LOVE a wrap on the 361. It's my main felling saw and the ability to turn the saw in any direction with full control is very handy. I'd reco a west coast clutch cover so you don't nip your fingertips though. I think a 44/46 or 66 series west coast will fit on a 361, but don't quote me on that.
I pieced mine together via Ebay for the actual bar and my dealer for the needed attachment parts, esp the side spring/screw thingy. Those were non-existant on other websites, so I had to go the dealer route. But I'd highly recommend a 3/4 wrap on a 36 series saw as a felling saw on the East Coast for firewooding. I run a 20" bar on it with full comp chain. It also has a hillbilly muffler mod that I'm quite proud of. Be careful about longer bars on a 361 as they're notoriously stingy with the oiler. I put a good scorch on a 25" bar with it in red oak before I realized it. Haven't looked at a high output oiler yet. Maybe someone can chime in on if it's worth it.
The wrap on the 460 is handy, but usually not necessary as most of the firewood stuff we cut doesn't need the 460's power just for felling, which is mainly why you want a 3/4 wrap. I've actually gone too far in a hinge before I realized it with the 460. The 660? Fugetabouit! With the torque and 'residual rpm's of the 660, you can go through even a good sized hardwood hinge in a flash. There's not enough finesse to a 660 for me, but that's just me. The 361 is just right for felling, IMO. Enough power to stay at the hinge and steer if need be, but light and nimble. I run a 25-28" bar on the 460 with full skip chisel. Mainly use it for bucking/blocking/noodling. Makes quick work of anything (except rocks) The 660 with 28" full skip is perfect for noodling as well. We cut selectively, often within existing stands, with grapevine etc and the ability to steer at the hinge, do soft dutchman cuts, sizwheels etc come in handy. The finesse I get with a 361 saves us having to drag something down with chains that hangs because I couldn't 'persuade' the tree down the way I wanted with a bigger saw.
The 660 is simply something to show off with, for my needs anyway. Occasionally, I run into someone wanting a tabletop out of a 5 foot oak butt and then it's fun to slap on a 36" bar and let her eat, but she's a hoss to haul around the woods. For me, anything other than absolutely huge hardwood that the 660 can do, the 460 can do almost as well.
As far as a scrench, I just bought a cheapo socket wrench and a 3/4" socket. It fits under the side wrap easily and you don't have to constantly remove it as you're loosening. If you go this route, get a longer wrench handle. This took me quite a few puncture wounds from the oversized dawgs to realize I needed a 10"+ handled socket wrench!
Stay safe!
