Need a little input

[Stano]

Ok late last summer my 67 and I went for a drive. I stopped to get a pizza and when I got back in the truck after about 5 minutes she would just crank and not start. Im thinkin coil. I have a older but never used until I got it Accel electronic dizzy, Accel super coil the square kind,MSD 6AL ingition. Its had this set up on it for last 3 years and I dont drive it that often. It ran fine til I shut it off and after 15-20 minutes fired right up like nobodys business and ran fine. After I got home shut it off did the same thing crank no start. I waited about an hour and tried it and fired right up. Im thinkin its coil like I said before but havent had any funds this winter to replace it yet. Just wonderin what some of you think it is. Ive checked and double checked the wiring and its good as new so what next.