It's a KNOWN FACT that Carter carburetors and their Edelbrock brethren do not like fuel pressure over about 6 PSI. People really need to stop posting dated information, because it's WRONG. You need to lower the fuel pressure. I'd go down to 5- 5 1/2 PSI. 7-8 is way too much. This is based on not only my personal EXPERIENCE, but the EXPERIENCE of pretty much everyone on this forum and elsewhere who've used this style carburetor. Posting 30 year old information that's WRONG doesn't help anyone. Between 5-6 PSI is on the Edelbrock web site, Summit, Jegs, the Edelbrock forums and pretty much any and all other automotive forums everywhere. That's what Edelbrock.....you know.....the people who MAKE the carburetor recommend.