Do GT40 valves fit 351W heads?

I was wondering if the GT40 valves are the same size (stem dia & length) as the valves in the mid '70s 351W heads?

FYI, I found out today that the GT40 valves are the same length & diameter as the previous small block valves.

GT-40 valves do fit. Those are what are in mine. IF you are going to the 1.94s I would recommend the ferrea valves. They are undercut and allow more flow with less valve lifts. However, as you get into the high lifts (past .5) they start to flow less.

Who's a good source and what is the street price for them?

i used REV valves in my old 70 351w heads. they are good valves too.i would check rev valves too.
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