Re: Need cam selection help on a 383 SBC
It's the edelbrock carb that is causing all the problems... just kidding.
That is a pretty mild cam, especially for a 383 and especially for 10.5:1, bet it runs really well.
When switching to 1.6 rockers sometimes you have to open up the push rod holes in the heads, I am not sure if you have to do this with edelbrock heads, but if the p/r contacts the head it will bend.
A roller will be a TON better if you go that route, it is expensive, but the gains are worth it. If you go with a roller you will most likely have to change springs, I would go with a Comp .530" lift cam or higher with 290+* of duration, hydraulic roller.
As for the thumpr cam, if I had the option of taking a bullet to the foot or having one installed in my car against my will, I would take the bullet. They are not made for power, they are made for sound, sound does not win races.
Also, did you check your p/r lengths? How does the valvetrane geometry look just eyeballing it? You can tell if something doesn't look right.
The only Mustang I'd ever own is a Fender.
'68 333" Camaro
'14 5.0 Mustang