Crane doesn't make a 268 duration cam. (Mild Hyd. cam that is.)
Perhaps, a Comp cam. Reguardless, if you can find the cams spec card, you'd be in good shape then. If not, theres a slight problem. Since he mentioned, "Biggest you can go with the stock converter", an upgraded converter would only be something like a 2000 stall for a street ride. Going more agressive would require a numerically higher gear ratio and lighter car weight.
OH, I went into my old mag articles and found the "Smog Dog Dyno Flog" write up. The low compresion 360 used regular sized tube headers, a cComp Cams XE262 (218/224-.462/.470-110 ) as the power parts. The Performer intake didn't net them much at all and a switch to a Edel. Q-jet netted a loss.
Base line power pulls were done with exhaust manifolds on this .040 replacement slug 360 to a tune of 262 HP and 371 lbs. Tq.
After swaping parts, it pulled 335 hp & 400 lbs. of torque.
This should be a fairly fun ride in a A body car with a reasonable set of gears and converter that should run into the 13's.
70aarcuda is right,
A 73 HP and 30 ft lbs. increase in power. Not bad for a cam and headers.
The cam they used, the mag, you could go one larger with the stock converter.
Whats your gear ratio?