1970 Chevelle Build Sheet

Van Nuys, California ~ Section 3 - 25 through 42

Section 3

Box 25: MODEL
The 5-digit Fisher Body style number such as 13637 for a Malibu sport coupe.

Box 26: TOP
If the car had a vinyl or convertible top, its color is listed here with a 3-letter code such as WHT on this example with a white vinyl top. Other colors are listed as BLK, BLU, GLD, and GRN. Convertible tops only came in black or white. If no vinyl or convertible top the box will have 3 hyphen characters ( --- ).

Box 27: ENG
A 2-letter code for the engine ID is listed here such as RV which is correct for an LS6 with manual transmission. This should match the engine type (L34/L78/LS5/LS6) and transmission type, manual or automatic and should match the transmission type shown in box 107 in section 8.
KO - L78 MANUAL
KP - L78/L89 L89 TH400
KQ - L78 MANUAL HD CLUTCH
KT - L78/L89 MANUAL
KU - L78/L89 MANUAL HD CLUTCH
TW - L34 TH400
TX - L34 MANUAL
RQ - LS5 TH400
RR - LS6 TH400
RT - LS5 MANUAL
RV - LS6 MANUAL
RX - LS6 MANUAL HD CLUTCH

Box 28: TRANS.
A 2-letter code for the transmission type is listed here and should match the transmission type shown in box 107 in section 8.
CF - L34 M40
CS - LS5 M40
CW - L78 M40
CY - LS6 M40
WO - M22 manual transmission
WL - M21 manual transmission
WB - M20 manual transmission

Box 29: AXLE
A 2-letter code for the rear end ratio and Positraction (or open) is listed here and should match the axle RPO code and Positraction RPO code (or lack of) in box 107 in section 8. This will vary depending on the engine option as the LS5 and LS6 rear ends were considered heavy duty.
CF - L34 3.31:1 Positraction
CW - L34 3.31:1
KF - L78 3.55:1 Positraction
KK - L78 4.10:1 Positraction
RU - LS5/LS6 3.31:1
RV - LS5/LS6 3.31:1 Positraction
RW - LS6 4.10:1 Positraction

Box 30: ALTER
A 2-letter code for the alternator and will vary depending on the output capacity needed for the particular car.
NF - L34/LS5 w/air conditioning
NJ - RPO K85 63 AMP GENERATOR
CW - L34/LS5 w/o air conditioning
CZ - LS6

Box 31: ALTER PULLEY
Three hyphens ( --- ) are listed whether air conditioning was installed or not.

Box 32: START MOTOR
A 3-digit number is listed and is dependent on the transmission type.
418 - MANUAL transmission
430 - AUTOMATIC transmission

Box 33: FUEL PUMP
A 3-digit number is listed as is dependent on the engine size.
727 - L78 & LS6 through at least 04-10
768 - All L34 & LS5, and LS6 from at least 04-21

Box 34: POWER STRG PULLEY
Without power steering two hyphens ( -- ) are listed.
CE - L34 & LS5 with power steering, without air conditioning
DD - L78 & LS6 with power steering
DE - L34 & LS5 with power steering, with air conditioning

Box 35: CRANK PULLEY
A 2-letter code is listed here and is dependent on whether power steering and/or air conditioning was ordered.
AA - 1 groove - L34 & LS5 without power steering and without air conditioning
AB - 2 groove - L78 & LS6 with or without power steering
AC - 3 groove - L34 & LS5 power steering and/or air conditioning
AD - 2 groove - L34 & LS5 power steering

Box 36: V BELT GROOVE 1
A 2-letter code is listed here for the alternator belt and is dependent on power steering and/or air conditioning options.
AE - L34 without power steering or air conditioning (Possible with LS5 as well but no examples)
HJ - LS6 with power steering (Possible with L78 as well but no examples)
HL - L34 & LS5 with power steering and air conditioning (three L34 examples found without power steering)
KE - L34 without power steering or air conditioning
TR - L34 & LS5 with power steering
UZ - L78 with power steering
YE - L78 & LS6 without power steering

Box 37: V BELT GROOVE 2
A 2-letter code is listed here for the power steering belt. If power steering was not ordered the box contains 2 hyphens ( -- ).
-- - no power steering
AE - L34 with power steering through at least 10-29
KE - L34 &  LS5 with power steering after at least 11-18
TR - L34 & LS5 with C60 and power steering
YE - L78 & LS6 with power steering

Box 38: V BELT GROOVE 3
A 2-letter code is listed here for the air conditioning belt. If air conditioning was not ordered the box contains 2 equal symbols ( == ). Power steering is not a factor.
== - no air conditioning
AE - L34 & LS5 with C60 and power steering through at least 11-13
KE - L34 & LS5 with C60 and power steering after at least 11-21 (One L34 dated 11-21 without C60)

Box 39: V BELT GROOVE 4
A 2-letter code is listed here.
BD - L78 without power steering & LS6 with power steering - with NA9 evaporation emission control noted
BE/BH - L34 some with only C60, some with only power steering, some with both.
BG - L78 & LS6 with and without power steering

Box 40: AIR PUMP & PLUG
Either TCS-2, TCS-3, or TCS-4 is found in this box.
TCS-2 - L34, L78, LS5, & LS6 without U14 gauges
TCS-3 - L34, L78, LS5, & LS6 with U14 gauges
TCS-4 - Five additional found to date and none have U14 gauges: 02-23 and 06-23 with LS5; 04-06 with LS6; 04-07 and 06-16 with L34

Box 41: AIR PULLEY
A 3-character code is listed here.
AIR - L78 & LS6
CCS - LS5 engine
L34 - L34 engine

Box 42: FUEL GAUGE
A 4-digit code is listed here.
7682 - L78 & LS6 through at least 04-10
7683 - L34 & LS5; LS6 from at least 04-22

* Belt routing:
1 - Alternator
2 - Power Steering Pump
3 - Air Conditioning
4 - A.I.R. Pump