Sorry for such a long post. I'll keep it as short as I can. I've got at fresh rebuilt 327 with PBM Thunder heads (World Products S/R), Performer intake, and an Edelbrock 1405 600cfm carb. I'm running an L79 pcv system. The engine runs great but I've got the typical problem that many others have with the car not wanting to start after getting it hot and trying to crank it after sitting for 10 or 15 minutes. Of course it's flooding due to boiling fuel. I've tried one of their 1/2" wooden spacers, then a 1" phenolic spacer, and now one of their insulator gaskets but without spacers. Nothing has worked so far. When it does this the only way to crank it is to mash the pedal to the floor to clear it out. If you have just drove it about 30 or 40 miles on a hot day like today it's really bad. I like the carb and it does great other than this. Good acceleration and plenty of kick but I've got to do something. I didn't put the block off plates in the intake gaskets when I put the motor together, which I know would help but at one time I thought I was going to run a Quadrajet that I have so I would need those unblocked for the choke unit in the intake. I really hate to have to pull the intake to do this since I'll have to get the a/c compressor out of the way and take the bracket off to do it and I'm not sure that would cure it. I understand part of it is the Ethanol in the gas we use these days. I would change carbs and go with a Holley Street Avenger or send my Quadrajet off for rebuild and tuning by Sean Murphy if I knew they wouldn't have the problem. Can anyone here that's had this issue tell me if they switched to a Holley or Quadrajet and cured this problem? Is a Quadrajet prone to suffer from this? I've never heard of them having these issues but I don't know. I see so many Edelbrocks at car shows I go to as I did today. I saw a bunch of them and 90% of them had no spacer or insulator gasket. I like them and they are easy to work on but I've had it. Any ideas, opinions, or suggestions are welcome.