Is this a real L78????

[Mr. Duece]

I have found wht is "believed to be" a 68 Chevelle SS L78 car. This is a 3 owner car with 25k original miles. I spoke with 2 of the 3 owners who verify this. I'm still looking for the original owner. The interior has never been removed nor has anyone ever looked for a build sheet. Beside the 6000 rpm redline on the factory tach and single 3/8 fuel line, is there anything else I can look for? This car is Grotto Blue/Black 4 speed, 488 12 bolt. Also what is the difference between the K8 and KO coded rear end housing and could you get this housing in another model other than an L78? Any help would be appreciated as I would like this car in my garage next week. Thanks, Don

[Bill Rose]

Don...It's unlikely you will fine a build sheet in a 68 Chevelle. Some have been found in 68 ElCamino's but to the best of my knowledge, they weren't stuck inside the 68's like they were in 69's for example.
Also, all big block 68 Chevelles had 3/8 fuel lines, including my 325h.p. 396.
Is the motor in the car? Check the numbers on the pad.

[Keith Tedford]

The K8 and KO rearends are both 4.88-1 ratio. In '69 there was the KK 4.10 rearend for the L78 and KQ 4.10 for the COPOs. I'd be surprised if anybody but an L78 owner would order the 4.88s.

[JoeG]

Were you able to order a 4:88 rear from the factory for a Chevelle-?-I thought the ring/pinion were dealer installed?

[Keith Tedford]

The 4.88s were listed as an option I believe.

[JoeG]

I was just curious, because 4:56 gears were an option for the big block vette in '69--4:56 gears for my '69 Chevelle had to be dealer installed......You could be right...???

[Keith Tedford]

We're running the stock 4.10s in our Chevelles and you wouldn't want any more than that for running down the highways. 3200 at 60 mph. 3800 wouldn't be any fun at all.

[JRSully]

My 69 L78 Nova was factory ordered with 4:56's and that is what came in it new.

[JoeG]

[ QUOTE ]
We're running the stock 4.10s in our Chevelles and you wouldn't want any more than that for running down the highways. 3200 at 60 mph. 3800 wouldn't be any fun at all.

[/ QUOTE ]
Yeah I know---I was goin 50mph at 3000 rpm on tall tires-----wasn't too much fun on the highway--but the 4.56 rear was killer...
Sully...my car was ordered with the 4:56 rear, but on the buildsheet it had 4:10---4:56 was listed on the dealer invoice---maybe because my car was going to be worked on anyway, the dealer figured he'd get paid for the work...

[Mr70]

Don
I sent you a PM.