Street 383 recommendations
I ran a 383 with that thumper cam, Performer RPM, and an 850 Holley dp, and it would snap your neck at go and pull like a sob.
It didn't sound any different to me.
I wouldn't be against swapping it out for that Summit cam, but with all the new cam/lifter horror stories out there lately, don't really want to roll the dice and fix something that isn't broke.
Got another 383 that I bought fully rebuilt with a Mopar 'purple' cam.
Is that a specific cam, or are there versions of it?