Hello I am looking into rebuilding my carb its a Holley 1850-3 i have never rebuilt a 4bbl carb before i have rebuild lawn mowers chainsaw weedeaters etc. I have done some research and found the holley rebuild kit i need is their holley 37-119 rebuild kit. I have also found a varitiy of kits that claim to fit as well including the quickfuel nonstick 3-200a the only differnce i can see in the two is the 3-200 includes the secondary diaphragm and the holley dont. They are around the same price is the holley brand better or should i get the free sec dia? Or is there another brand yall recommend? Also since this is my first attempt is there any tips and tricks or anything i should look out for or be aware of before i begin thanks for your help.