Tad hard to start......pretty sure fuel issue

At times I have a bit of a time starting. When cold no problem, couple of good full throttles and alive (temp about 60). I came in after running pretty hard yesterday and it sat about an hour (outside temp about 60). I gave it about a primary full of pump and it cranked and cranked. I gave a full shot and it cranked some more and then started to catch but sounded like it was flooded and finally lit. I drove to some relatives and it sat about 3 hours, gave it a primary full and fired no problem (outside temp about 55).

Do ya think I flooded it after an hour?

408
Holley 750 HP
full Mallory ign. with CD box
10.65 CR
.610 intake with 252 @.050
Eddy 160 gph elec pump in the rear
regulator at 6 1/2 psi mounted on the RF fenderwell split to the holley

I am leaving my computer for the evening and will answer if necessary in the morning.

Thanks all......