289 stumble
I am sure someone can put their finger on this. I have a mildly modded rebuilt 289, 4.030 bore 9.1:1 compression, edelbrock performer rpm cam/heads/intake, and edelbrock 600cfm carb, and a rebuilt AOD.
my problem is that from a stop under hard acceleration, the car runs pretty good. but when crusing at ~50mph in 3rd of 4th, SOMETIMES it will stumble when giving it pretty good gas and then "catch up" about a second later. It is not every time, only SOMETIMES, so it makes me think its the carb, but could it be a timing issue? I am running 15 degrees at idle (1000rpm) in park, and 36 total at 3000rpm. I haven't messed with the vacuum much...
I wonder if I should switch to a holley carb or the edelbrock is good enough.
Thanks.
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