427 engine..

[Enoch]

Tom I'm restoring a 69 L-89 corvette and it's body build is 8-28-69. I also have seen later L-89 vette's. It also could be a L-88. 074's came into production in the 21000 serial # range. Which was earlier than this but it could have been a left over.
Rich.
it may be worth poping a head off to look for High dome pistons...or pulling off the pan to see some dimpled rods

[WILMASBOYL78]

I will try to get my friend to remove the pan so I can see about the crank and rods. This would be an awesome setup in a street machine... The heads are real nice: no welds or broken stud mounts....should have some more info tomorrow.

wilma

[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.

[kwhizz]

[ QUOTE ]
"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.






[/ QUOTE ]


The Knowledge on this site is beyond belief.........

Ken

[nuch_ss396]

[ QUOTE ]
"could be a L-88.".... #7115 crank used in all production L88s,#6223 sometimes used but mostly the #7115 cranks used in L89s.


[/ QUOTE ]

Kevin, please elaborate on this point for me. Are you
saying that 427 L/89's used '7115 cranks? Less the L-88
and ZL-1, I don't think any other production 427 engines
got the '7115. As only the '842 heads separate the L/89
from the L/71, L/72, L/78 - how or why would the '7115
crankshaft replace the '6223 in production? I expect there
could have been exceptions, but my research has indicated
that the '7115 was super-special ( L-88 & ZL-1 ). Please
correct me if I'm wrong.

Steve