I also use a Lofgren on my 69 Dart street/strip car. It only goes mid 12's but I like the additional safety factor. For what its worth I bought a brand new RCI and I couldnt get it to fit worth a crap so I sold it and got the Lofgren,its a little tight getting it in while the trans is in the car but definately less hassle than the RCI.

416 stroker from Nick at Compu-flow. 11.14 in full street trim. Seems like a new best every time out.
11.06 open headers----so far!!