Chainsaw Repair

Weld up the existing slot, finish off with a disk grinder, and place a regular bar with a mount pattern like you want, aligned with the top of the bow bar, and trace the pattern of the regular bar mount onto your bow bar. This will make a low mount bar where you do not need to butcher the cover.

You can mill out the slot on your Bridgeport, oh that's right, you don't have a Bridgeport? So drill holes along the slot and file out with a file.

Make your new oiler hole etc.

That big one looks nice but I bet it has a nice price too?  First new manufacture wide bar I've seen. That one would be mighty nice on a 60 - 70 cc saw. With the slots made like that you could get away with not having to cut out the chain cover.

There's two companies in that area of Oregon that make the narrow bars and mine is made by the predecessor of the other company. It fit my Stihl 026 without any modification what so ever. It was a 24" one and I already had a like new 83 DL chain that fit it.

Every firewood cutter should have at least one bow bar chainsaw.

More new bows

I own one myself ,McCulloch and operated one on a 250 Mac back in the mid 60's cutting fence posts .The deal is with the chain running on a radius it gets more bite .Hook the spike and hit the gas .I'd never run one without the top guard and spike because they do kick back . In the old days all we had was chipper chain . I'll  bet they would fly with chisel .