yeah, they are larger than stock except I cant remember if they are the old school thread pitch.

another issues to consider for using larger than 1":
stock brake booster enough to handle it?
Larger brake booster will work but requires tweaking. relocate the clutch master or just use one from a honda civic with remote fluid reservoir and use a spacer between the firewall and the larger booster like the FB. then another issue will come in play as you will need to extend the brake's push-rod. I havent gone that far but the above are most obvious issues.

 

Funny how details change in my memory.

So its a 1" bore and its from NAPA not Lordco.

This is the URL for the part

http://www.napaonline.com/NOLPPSE/(S...467_0221569972


The Part #

Part: SS 4739467

And the specs

Attributes
# of Line Ports : 2
Brake Master Cylinder Bore Size : 1"
Brake Master Cylinder Line Thread Size : (1) 1/2" - 20 & (1) 7/16 - 24

The price was good!

Price : 35.99

It was the best fit I could find!