In my experience the correct board in DSYP is a 2x6, much easier to work with and far less suseptable to splitting. The only time I've seen wider boards are the larch laminates or tropical subspecies like apitong., etc. and they are usually 5/4 thick.
Self drilling 1/4" screws are best for securing floors.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
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Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain