Ethanol
Ok, so I am aware this question will stir the pot but please try your best not to dive down the ethanol is the devil route...
If I wanted to rebuild my motor to run modern ethanol fuel what parts need attention?
I ask ask I found a carb rebuild that states it is compatible with modern fuels, what other parts would be needed?
Well, when I built my 360, in 1999, 87E10 came to town, and for a while, it was all we could get.
I made no changes to my build whatsover, and that combo, minus the cam, is still running today, and still runs just dandy fine.
The carb I installed was and still is, a Holley 750DP, and it was rebuilt in 1977 with a jobber kit.
In about year 2000, I upgraded the Factory 340 fuel pump to something I found in the Mopar Performance catalog, pricy thing it was, and it is still on the car. I installed a new 3/8 steel line that same year, with EFI-rated neoprene jumpers on both ends. Well, last year, 2022, I had to replace the rear jumper due to rot. IDK, that's 22 years, so what do I blame the rot on? I'll tell you; the rearend was dumping oil-vapors on it from the vent, which I promptly relocated.
In addition; I purchased a large metal-canister EFI fuel filter and installed it at the back, in front of the passenger-side wheelhouse and changed the pump to carb line to a one-piece new 3/8ths line, with a tiny neoprene jumper to the dual-feed. All of that is some 23 years old now (minus the one jumper), and the car motors just fine.
The tank was new in 1998, and has never seen anything but 87E10, except one time when I dribbled a few gallons of 91 gas into it for testing purposes.
In other words, I got nothing bad to say about 87E10, and it goes 93mph in the Eighth in my combo.
And no, I have no percolation issues either, but, I admit, my many-decades old 750 is sitting on an Airgap, which sits on a SBM running at 205* minimum coolant temp, and she gets her air from on top of the hood.. And, you know, it hardly ever gets up past 37*C up here, lessee, I think that is 99*F..... so, maybe, I'm just blessed, lol.