Need help choosing a cam 1969 340

sealed power L2316 pistons. what is the compression height compared to the stock early 340 piston? link says the same
are you above deck or how far ?
more important whats the usage and how do you want it to drive?
is power more important than sound?
what's your exhaust
if headers the 50 year old 340 grinds have way too much exhaust duration which works with the wide LCA and stock exhaust manifolds
how much lift can your heads, valve stem seals, springs take
are you going to cut the guides for Viton stem seals
you say port work so you are doing a modern multi angle valve job?

did you read the links posted above
like
What is my compression with L2316 pistons
most of these builds come out around 9.5:1 with no quench (pity)