Intake manifold machining question

[RCCDrew]

I'm putting an rpm air gap intake on a 340 in my cuda. I don't know what's been done to the block and heads as far as machining. How can I determine if I will have to do any machining to the intake to get it to fit properly?

Thanks in advance.

[Chryco Psycho]

is it hard t o figure out other than trying to bolt it  on , if you cannot get the bolts into the heads on both sides the intake is too wide

[RCCDrew]

Ok then.  It bolts on, I was mostly worried about a vacuum leak between the intake and head.

[Chryco Psycho]

if the heads are milled to increase compression the intake will be too wide to fit easily so if it fits you should be good

[sprecks]

I'm not sure about small block numbers but on a big block the rule of thumb was for every 0.030" milled off the head, 0.010" needed to be milled off the intake side.