Help… engine skips after driving 30 minutes.

[jcsmith23]

I’m new to this site. My father just gave me his 40 Ford Coupe. He has had it over 40 years and never put it on the road. I have finished it and trying to work the kinks out of this fresh rebuilt flathead. After driving around for 20-30 minutes it wants to skip or something. Runs fine up to that point. Not running hot. It is 59AB block with offenhauser intake and heads. Bored 30 over with an Isky cam. Electric fuel pump and electronic ignition. Running 2 stromberg 97s rebuilt by uncle max. I have fuel pressure set on 2. Any ideas?