Slow filling tank

I have a Sebring kit with a 302 Ford. When adding gas, I have to fill very slowly or it burps and runs all over the back. this worsens as the tank gets about 3/4 full. The nozzles will shut off, but the gas will often puke anyway. I don't have build sheet, so not sure of the tank mfgr. I am guessing this is a vent issue. I plan to drop tank and may add a vent line to the filler neck. Has any one else experienced this?

thanks
McQ

Mine has the Classic 19 gallon tank and it fills easily. It does splashes at the end if it's pumped in at full speed. I can PM you pictures of the fill and vent if it helps. I don't know what the Chevette tank looks like if that's what you have.

Chevette tank here (unfortunately). No filling issues. I think you definitely need a vent tube

I'm fairly certain that our "MX" was built with C.R's '19 gallon' tank. I have to be careful that I don't fill the tank completely and then park the car on hot day ... the fuel expands up the filler pipe onto the gelcoat. This happened once, several years ago. Fortunately, twas beside the car when this happened and I was able to siphon fuel out before there was any serious damage. It taught me a lesson, though.
JimboQuick

Jimbo/Jerry pix would be great. I went to some sites suggested elsewhere under 'tank issues' and may order another filler tube. I see some listed with a vent tube already attached. this will be a spring project..

Can for sure send you pictures over the holiday weekend. Will be playing in the garage as much as possible.

I also had the Chevette tank originally and I had slow fill issues too.  I tried to find a gas station where the parking area in front of the pump sloped away from the pump (no joke).  It helped, but was just a band aid solution.  

Mine was due to lack of venting.  The air had to escape from the filler pipe and once it got about 3/4 full, there wasn't enough room for the air and gas to pass each other.

The new tank I built has a 3/4" vent line that will be connected high on the fill pipe right under the cap.  It also has a separate 5/16" vent line connected to a roll over vent valve.  The 3/4 line should vent the air as fast as I care to put the gas in and will still be sealed when the cap is on.