340 cam in a 318

The OG Street Hemi B/RB cam had 284* duration and .471/.474" lift (split pattern) and 108*LSA.
Mopar Performance reeingneered the Direct Connection original to: 280* duration with .474" lift (single pattern) with a 110*LSA in the late '80s if I remember correctly. Comp Cams' Magnum and Isky Mega had upped the ante with their more modern profiles, so the duration advertised went DOWN to 280 from 284 and the .050" duration went UP from 228 to 230, and they widened the lobe separation to 110 from 108 to clean uo the idle some and broaden the powerband some. In big blocks, the late grind impressed me with it's performance but the magic "sound" was gone. Never tried the original SB Street Hemi, but it was ground on a 112, so it's LSA moved the other way, and the intake lobe was common with the exhaust. A friend used one in a low compression (reman late 70s shortblock) 360 with J-heads and Crane 1.6 roller rockers with nitrous in a '72 Duster. Ran better than it should, until they cooked the bearings and it lost oil pressure. Either way, I prefer the smaller (two steps) 260/268*-.430/.450" Purple Shaft in a 318 for performance and a 360 for towing.