Raced with one for many years. The reason it was developed in line was because NHRA rules at the time dictated an aftermarket intake could be used as long as the carbs were in the same configuration.

It was better than the stock inline, and marginally better than the Vanke modified inline. We ran both, and the RR was about .05 quicker than the Vanke. Spacing the lid up an inch did help. They were also a high rpm type intake, due to the short runner length. We used one with the cross ram lid, as well, and Bob George highly modified it inside. It lowered the rpm range a bit, and gave it a bit more bottom end, but was still not ideal.

They had a tendency to blow up. Many of them that you will see have welds and cracks on the lid, this was caused by fuel puddling.

I'd never run one on the street.....such a PITA. Until the intake got warm, they ran like a box of rocks. Someone said plug fouling, all of it. They were designed to operate at some rpm and did not like idling, putsying around. They are not a big torque maker, lacking on bottom end and adding some to the top.

They worked in a higher rpm band....around 7K as compared to the stock crossram which operated at 67-6900 rpm.

It was legal, and the best option for class racing a street hemi back in the day, but was never a real good setup.

Depending on what you are doing, you'd be much happier with the Chrysler MP crossram. They are much, much superior and better. You can't beat the regular CR. We run one on our NSS car now....shift it at 6700 rpm, even idles and starts easier. We've run both in the past, and the CR is much, much better.