Originally Posted by fast68plymouth
Off the top of my head I’d say it’s too big for what you’re doing with the vehicle....... especially with the bigger heads and bigger valves.

Did you measure the deck clearance and cc a chamber or two?

Dwyane, the forged pistons are .018 above the deck & we didn't CC the 440 Source heads, but if they're close to 80CC
as advertised, what would be a good performance / RV cam? The 383 also has headers & a Weiand dual plane intake.
Thanks again for the advice.