I agree with others here... you are on the verge of over-camming your 383.

I'm sure that you know this, but a solid cam is generally compared to a hydraulic cam this is 10-ish degrees smaller due to duration taken up by the lash.

I have a Scott Brown 232/242 solid flat tappet in my 383, but I have 3.91s, 3500 converter, headers, and more compression than you... and its still kinda lopey.