LD340 intake is it still good after this modification

FWIW, the MP book says to mill it down to 3/8ths and round it off on the edges.
When I mention the cam lift, AKA "BIG", of course you should have realized that the duration also goes up, way up. Consider the time of the intake, publication and the cam specs of the day. Often a 1.6 rocker was needed for serious lift. Even with cams at or above [email protected], lift wasn't as it is today.

Cams of this size don't have a streetable bottom end like the uncut intake is designed for so the low end is largely ignored. From the MP stable of Purple cams, you would be looking at a 296/.557 w/1.6 rockers (.594 lift, lash not included) to take advantage the modded intake the way MP puts it in print.

[email protected] w/.594 lift is at the outer end of a street driven cam for most.
Though Lord knows, far be it from me to tell you what cam is to big for the street.
How did that one member put it in his sig? "The cam isnt to large, you just don't have enough motor!" Or something like that???
LMAO!

Yea yea yea, I know some guys here run a cam similar in spec and a AG intake in there rides.