If I remember correcty from the McGurk article, all his cams were dual pattern.
http://www.selectric.org/55chevy/soup.htmlThe number 5 cam seemed to be the winner in my book for a street engine. It had 245 degrees and .421 lift on the intake, and 284 and .410 on the exhaust.
The 235/261 heads have very poor flow. Not to mention the valve train geometry is terrible. You can't put alot of lift on the intake, because it's basically on the bottom of the head. The exhaust has tons of room for lift, but because it's canted, the area around it shrouds it and actually reduces flow. Unless you grind some material away from the exhaust valve pocket, adding lift is useless, adding some duration will always help though.
It's always worth a call to your cam grinder for recommendations too. I know Comp Cams still can do a 235/261 cam. You may have to give them a call to see what lobes are availible.
Other cam grinders, I'm not familiar with.
One thing you could also do is look into Manley's Street Flo valves for your exhaust valve. They claim a 14% flow increase at .400 lift and 93% flow increase at .150 lift. Seems like the perfect addition for a shrouded low lift exhaust. They're economically priced, and since the stovebolt exhaust valve is the same as a small block, you won't have to have them custom made.
http://www.manleyperformance.com/dl/2014/valves.pdfhttp://www.jegs.com/i/Manley/660/10721-8/10002/-1
