I am in NH, I have 1979 II w/ 345 this past year I started working out the basics on my truck. Rather than dealing with the carter carb I opted to in install an Edelbrock 1406. Everything seemed to go well, but when I am coasting around town it seems like the thing is loading up with fuel. Get some minor backfiring. Has anyone dealt with this issue, do I need to change out the metering rods to something different?