hard starting 1990 k-1500

[57 3100]

guys,
i have a 1990 k-1500 4x4 with 5.7, 350 v-8 with 140k mileage.
lately on some days, when hot, a turn of the key will crank it over as normal, but wort start, like there is no spark or fuel.
3 years ago when i first purchased it at about 115k miles, i put a new ignition module and coil on it, and just recently tuned it up completely with rotor, cap and plugs. wires were replaced 3 years ago. about 1 year ago i had a new fuel pump and relay installed.
wonder if i should start by installing a new ignition module and coil, since those are easy to access ?
hope it aint a fuel problem again.... i really dont care much for these injected motors... i like old school manual fuel pumps and such.
when it wont start, i turn the key off, try cranking again, and most times will start the second time. a few times i had to do this 3 times before it would start. once started, it runs fine and smooth and never cuts off once started.
leonard
any thoughts guys ?
thanks