This crossmember will fit 1996 and later 4L60E, and 4L65E transmissions for LS engine swaps.
We recommend a polyurethane transmission mount. The GMTM is sold separately.
For the 1973-1977 hardtop frames the distance between the crossmember frame mounting holes is 51-1/8″. To ensure proper crossmember selection be sure to measure your frame before you order.