Racing ECM available from GM

[Shannen Durphey]

Maybe discontinued, but 1993 Olds Rocketparts book shows part no.
22551577 ECM for offroad applications using quad 4 engine, uses
factory inputs, supports "rocket recorder"??? data acquisition system,
and race cal's are available as sub part nos.  
Anyone have more info?

Also available is motorsports wiring harness # 22551578 for above ECM,
which has needed circuits only for use in racing classes.

This stuff may be mainly intended for SCCA classes.
Shannen