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The guy selling this 77 is telling me its a L1 and L82. Can someone tell me what that means please. Its also a 4 speed manual if that makes a difference, probally not though.
4 Speed Manual makes a BIG difference. about 2 thousand to the value. L82 is the better engine. But make certain it really is a L82. some will claim it is when it's not. Check the VIN on the windshield pillar and the stamp pad on the block. (just in front of the right, passenger side head) the sequential number should match. And post up Vin on here. We can tell you quickly if it is indeed a L82. As per L1. I'm thinking he's pulling a fast one on you, Or he really doesn't know squat.
and when it comes down to it, L82 or L48 not a hell of a lot of diff in actual power or value. looks like prices are inching up on 74-newer cars these days. there are many things that will devalue a 77. and those same things will make it a huge PITA to own, repair and enjoy. many are spelled out here. scroll down to post 107. it is a reprint of the original opening thread. pay special attention to the rust issues. https://www.corvetteforum.com/forums...orvette-6.html and this is not listed in that thread. turn signal switch. make sure everu thing on that switch works. turn sig. wipers. high-low beam.
Last edited by derekderek; May 22, 2021 at 11:45 PM.
The VIN number on the windshield pillar stamp should include a L or a X at the 5 digit.
L=L48 or X=L82
The VIN number on the engine stamp pad on a 77 will not include a L or a X.
You must go by the engine stamp pad suffix code.
The same turn signal switch was used W/T&T columns between 1976-1979 1st design.
The wiper switch is a one year only for 1977.
If equipped, the Cruise Control servo and cable is also a one year only for the 1977. A/T transmission only.
There is a big difference in a 77-80 C3 having the L-82 4 bolt main engine versus the standard passenger car base L-48 engine, X2 for the 4 speed cars with the Super T-10 transmissions which are very rare, especially today. Not only is the there a big stock performance difference between an L-82 4 speed car versus an auto L-48 C3, when you need to do a rebuild/upgrade like I did in 2014 with my stock L-82, the basic structure of the L-82 was really ideal to do an upgrade, using many of the L-82 forged performance parts, which is not the case for the base L-48 motor. I reconditioned/reused the Forged L-82 Crankshaft, The L-82 rods, the Aluminum L-82 intake, an obviously, the L-82 4 bolt main block......the 71-80 LT-1/L-82 are basically all the same basic engines....the base L-48 engine is NOT the same type performance engine, basic GM Passenger car V8.
Last edited by jb78L-82; May 22, 2021 at 03:42 PM.
Thank you also for the feedback and your info. So, if this is the L82 and the L1 with the 4 speed , he's asking 15k for it but I can get it for 14k I think. Body is straight, no rust I can see. Block sounds strong with 48k miles on it. 1 owner car. I looked at the title which said 6 miles on it when he bought it. He did put a cam and a new intake on it. Also a set of headers. Looks like the stock heads. I know they only made so many 4 speeds that year.
You have to check if the partial VIN on the engine pad in front of the passenger side cylinder head matches the last 6 of the VIN.
You should also see the letters CLD on the pad indicating L82 with 4 spd.
Ask him what L1 is supposed to mean, there was no L1 option code in 77.
Never heard that ID number. Ask for number on pass. side front of engine block as mentioned. Also ask for any and all original parts removed from car to be included in purchase. mike...
I agree that L1, LT-1, and 1LT are meaningless for a 1977 Corvette. Perhaps there is a C4's LT1 engine installed, or a similar roller-cam crate engine. A photo will let us know!
Perhaps the owner meant to say the L82 is a milder version of the 70-72 LT1 350s. They shared the same block, forged pistons, Pink rods, 4 bolt main and windage trays. They had larger valves, guide plates, and aluminum valve covers, pretty much the same only a milder hydraulic cam. They were very good engines. The L82 came with a Q-jet vs a Holley I believe.
OP, In your other thread in C3 General, you had a couple questions regarding the design and reliability of the 77’s rear differential.
Gary (GTR1999) is the world wide Guru regarding the rear differentials in Corvettes.
Since he posted a comment, you might want to ask any differential questions you have here as well.
1977 l82 l1
