Largest SB Hyd. Cam with Stock Springs/Rockers?

It depends on the condition of the springs and if they have rotators, I have ran a MP 280/.474 with stock springs & rockers on a 360- the motor had 6k miles and the springs didn't have rotators. It may have had the 340 type springs in it too since the motor came out of a 74 360 Duster that was converted to a racecar when it was less than a year old.