Also, just wanted to add that while the 2292's are standard for all SBC engines, the transmission mount will be specific to the year range, transmission type, and whether it is 4wd or 2wd. For instance, a 2wd TH400 will use a different mount than a 4wd TH400, and a 73-84 4wd will use a different mount setup than a 84-91 4wd will. My 1980 K25 with a TH400/NP205 actually uses 2x ea of two different rubber pieces that sandwich the crossmember and then have two big bolts that go through the small rubber piece, through the crossmember, then through a bigger rubber piece that straddles the crossmember, then threads into the bottom of the figure 8 transfer case adapter.