Go with the big pump, it will save you a lot of headaches if the stock pump is inadequate and causes the carb to go lean. Tim

1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!