[Musclecarkid]

"could be a L-88."....Cant be an L88 w 842s that late in production. Open chamber pistons wont mate to 842 heads and closed chambered L88s were long gone by Aug 69. The "leftover" head theory wouldnt apply as the matching closed chambered pistons would have to have been used in conjunction with the 842s also. The pistons cant be swapped out on those 2 aluminum head castings... Both motors used dimple rods so looking for them when dropping the pan wont tell you except the L88 had floating pin 7/16 and the L89s had 3/8 pressed pins dot rods . #7115 crank used in all production L88s,#6223 sometimes used but mostly the #7115 cranks used in L89s.