427 engine..

[WILMASBOYL78]

Came across an engine in my travels this weekend. 512 block H309..August 30, 1969..it has 842 aluminum heads and a vintage Edelbrock slanted manifold. Don't know anything yet about the bottom end..deck numbers appeared to be gone from a prior rebuild..is this too late to be a 69 L89 motor...could you buy this setup over the counter...thought it might be of interest to someone here..... any thoughts?

wilma

[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

[nuch_ss396]

Hey Tom !

I'm still waiting for you to build that oval port 396 with
the L/78 camshaft. And after what we learned last
week about using the rectangular port intake with the oval
port heads ( power up to 6500 RPM's ), I can't wait to see
someone try it. Odd thing is I have all the necessary
components ready ( L/34 - 402 long block, L/78 camshaft,
and the now infamous rectangular port intake ). I just
have no time to do it or a car to implant this into.

Steve

[WILMASBOYL78]

I agree...it is on the list of things to do. Got 2 396 blocks in the garage and 4 sets of oval port heads..that should get it done. I have 6223 crank and a decent set of rods and lots of misc. stuff. I am out of 163's at the moment..used the last one on the project car. But they are avaialble.....it would be a cool motor to drop in Karen's 69 Camaro and put that little small block in the corner still need to build a 4spd street Nova that I can beat on..this would be the engine for that effort!

[SuperNovaSS]

I was told all 427s used the 7115 crank.


Jason

[KevinCav]

Hi Guys,
I have had two original 69 L89 Corvettes(one for almost 30 years)and both of them had the 6223 crankshafts. One is a January car that is a 4spd and a late Feb. car that was an automatic.Both cars are very original and unmolested. I also have a spare original L89 engine that is serialized for a car built 2 or 3 days before my Jan. 4spd. car and it also has a 6223 crank. To the best of my knowledge, the 7115 cranks were only used in the L88's and ZL1's.