Turboswede

I think just about everyone knows LT1, L88, L82, etc. but does anyone know the codes for the following engines?

68’ Base 327
69’ Base 350
69’ 350/350

On a separate note, does anyone know the duration of the stock 68’ 327 cam at .050”?

Finally, was the LT1 the only small block in the C3 to use mechanical lifters?

Thanks!

Durango_Boy

68’ Base 327 - L79

69’ Base 350 - See below.

69’ 350/350 - L46

GC: 350ci, 300hp MT
GD: 350ci, 300hp MT
HW: 350ci, 300hp MT
HX: 350ci, 350hp MT
HY: 350ci, 300hp MT
HZ: 350ci, 300hp AT

Gordonm

The L79 327 was the 327 350 horse. The base 300 horse 327 was just called the base motor.

Gordonm

No some of the high HP 327s used mech lifters. Actually the 283s also used some solids lifters in the high HP version and some of the FI motors.
Missed the parts on C3s using solid lifters. ithought you meant SB motors. My bad.

RHD '68 L89

A book I have, Martin Schorr's Chevrolet And Corvette factory High Performance engine Specification book, lists the 68 300hp as an L30 and the 350 HP and L79. The same engines are listed for 67 but the 300 hp lists as an L75.
For 69 the base (300HP) was L48 and the 350 horse was L46.

The suffix codes as listed by Durango can be decoded to the engine size, HP, trans application and some options.

I believe you are correct in stating the LT-1 was the only C3 small block with solid lifters but they were used in HI PO C2's as well.

Can't help with the .050 duration specs

Solid LT1

YES! LT-1 was the only small block Vette with a "real" cam in it (solid lifter cam.) My wife thinks her 1970 LT-1 roadster needs a BIGGER cam like my 72 LT-1 has (thats why I love her so much!) Quote: it's too quiet! I want a motor that lopes at idle like your 72 Vette (motor is a 370HP LT-1 in her car.)

jjarrett

hi! i have a 76 that is a project and i think the motor has been replaced, if someone can help identify it-- these are the # vo9izcls.--there are some small # also on the flat place and they are 1g5405823.does this make any sense?thanks---john

gkull

My 61 283 2 X 4 barrel came with a mechanical cam. Don't quote me, but all the highest hp small blocks for each year were mech. cammed. I know that the 63' 327 top two had mech.

Ironcross

You can go all the way back to the 265 ci small block engines and all the high HP engines were solid lifter engines. Even some of those in the passingers cars were solid lifters. The dual quads and FI cars were split as some FI`s were solid and some hydraulic, the same with quads. However the LT1 350`s were the only solid lifter engines in the C`3`s. ...

Scott Marzahl

To answer the poster's second question, if it is a 350HP L-79 327 then the durations are 224/224 degrees at .050". If it is a base 300HP motor, then the durations should be 194/202 degrees at .050".