Years ago I knew a guy who had a 396/325HP Impala...
TH400 with 2.73's...He had already installed dual exhausts ( no headers ) and wanted alittle more...so he put the Isky 262 and fresh Isky valve springs and retainers to replace the stock ones....He didnt want to change rear gears since he traveled the freeways alot.The 262 cam idled real good ..just alittle bit bumpier than the stock 325 HP/396 cam...but still real good...not rough at all.But out on the freeway is where you really felt that cam....quite a noticable improvement in passing and hill climbing power...he really liked it...and it was quiet also...no soild lifter sound like many of todays fast acting hyd cams.
That said it is NOT a race cam....If you want power in the off idle to 4500 rpm range its a good cam...but dont expect it to make power at 6000 RPM.
If you already have 3.73 gears you might not like that cam....but with 3.08 or 3.31's it's a nice piece.Wont set the world on fire but it was never designed to do that either....but for everyday driving or towing it's perfectly fine.
1969 El Camino
1969 LS-1 engine is a 427/335HP BBC
passenger car mill..( mine is slightly modified ).