They don't unless it's something recent. They don't even sell pumps that fit correctly for at least some of their customers, and there has been quite a few threads on the offset inlet/center inlet topic over the years. They do make the connectors easy to do and offer a complete 'kit' which is easier and more convenient for most people than piecing the stuff together from a pump supply shop. Maybe they're selling the right pump now, I don't know. When I redid my fuel system for the second time to go with dual pumps, I bought pumps from a place that had every kind of in-tank pump imaginable and had photos that showed the differences in all the available pumps and which ones fit correctly in the LT1s plastic buckets and which ones don't.

 

I run 2 pumps. 97 SS. Same type. Running for many years now. They both run constant on. I have a switch to turn pump #2 off. But, I seldom turn it off. No plastic bucket. Each pump has been mounted in an over/ under config. The gm stock sending unit was modified by me and my grinder/ welder.

I think a side to side config would be better due to some fuel starve upon low level and hard cornering.

Easy to access due to entry on top of rear floor pan.

I modified the complete fuel system curcuit. I run the stock return line to the tank from a after market fuel regulator.

I have never used racetronics parts. Purchased all my parts from Summit.

I have plenty of fuel for my FI app.