Speed Freaks Wanted
A pylon racer in my club built something like that a decade ago. VERY small fuselage with conventional tail, twin .21 pylon engines, long engine nacelles for the pipes (but not all the way back to the tail)...
It was very fast, but it didn't have a very long lifespan... The pylon engines didn't have throttles, so it went in the first time an engine quit. Too little vertical area aft of the cg...