Help identify cam please

lots of duration and low lift for unported stock heads and springs
stock 340 cam is about 209 on the intake @.050 so this one is a lot more duration
do you have high compression? if so if you have gears and a converter you could try it
but it costs mid range compared to a modern cam
design is around 40 years old mfg quality good if this is new
has 112 lca stock was 114 but stock 340 has really long ramps which the 114 helps hide and also bleeds off excess compression/ dynamic compression

post up your complete build and someone like NM or AJ will run the numbers for you
what's your cranking compression now and what is your current cam?
most likely this is similar to a "white box" cam and may be a copy of some popular GM cam put on a Dodge billet
The .050 evens are only useful for "degreeing" the cam using the .050 lifter rise method
seat timing determines how the cam works some other vendors using that grind have SAE seat timing
which incidentally is at .004 cam lift with 1.5 rockers (.006 at the Valve) (same lifts Crane uses)
the much longer exhaust was due to the poor relative flow of the exhaust on the LA heads- especially with a stock exhaust (no headers)
If you have newer/ ported heads and /or headers you do not want that much additional exhaust duration
end of rant