1969 C20 Build Sheet

[mikedean58]

I found the build sheet under the seat. It lists the engine as UB. What does this code mean? Its a 69 C20 Custom with a 4 speed and big block. Trying to figure out if its an original big block truck.

[SS Tim]

Can you post a picture of the build sheet? Have you checked the SPID or engine ID code? Also are you trying to verify if the truck had a BB (as built) or that the engine you have is the original BB?

[mikedean58]

not a very good picture. the glove box door has been replaced with a different one so the sticker info is inaccurate. i haven't checked the block numbers but previous owner said he did and was told it is a 1970 402? I know 69-70 is when the 396 to 402 changes occured but trucks/build sheets/SPID have been known to say and be all kinds of things.

[bollybib]

For 1969, UB corresponds to a 307 V8 with a manual transmission according to the Chevrolet Truck Parts Catalog (p. 26).

[mikedean58]

On another thread here, I found the 307 was UA.

http://67-72chevytrucks.com/vboard/s...d.php?t=505742

[SS Tim]

"UB" is a 1969 307 cid 200 HP 2BBL V8 truck manual trans. application. It can be confirmed to some extent by also running down the partial numbers on the frame mounts (box 16) and the carb (box 26) with a parts manual.

LMC ref.307 CID V8 - C5, K5, C10, K10, C20, K20, Suburban
Year Engine Identification Codes
1968 ZS, ZO, ZP, ZQ, ZX, ZY, WH, WG, WA, WE, WC, WO, WB,
WF, WR, WI
1969 UU, UQ, UA, UB, UC, UD, UE, UM, UN, UF, UO, UP
1970 TAT, TAP, TAR, TAS, TAH, TAI, TAJ, TAK, TAN, TAO
1971-72 TSS, TSP, TLB, TAJ, TAD, TDP, TDB, TDA, TRA, TJP, TJR,
TAH, TDL, TSR, TJT, TJS, THA, THC, THD, THG, THK,

[bruceman1968]

Originally Posted by mikedean58

On another thread here, I found the 307 was UA.

http://67-72chevytrucks.com/vboard/s...d.php?t=505742

The 1969 307 could have either UA or UB suffix codes.