I have a 372 oe that that began life as a 365. Along with a new top end, I put on a well used rebuilt HD12 carb. It's been taking a lot of pulls to start, and last time I tried to use it , it kept dying as soon as I cut with it, Restarts just fine, but keeps dying under load. So I thought I would try a different card to see if it changed anything. Have not installed it yet, but I did open it up on both sides as I had heard reports of metal filings, etc in aftermarket carbs. Won't know til I try it, but it seemed pretty well made form just looking at it. I know nobody here would ever admit to buying anything Chinese (except chow main?), but please, wish me luck anyway. Fuel lines and filter look fine by the way, so I don't think that's the problem