Block ID Help Needed

[musclecar fan]

Block cast is 3969854

Stamp: T02191KB

Can't figure out the extra "1" before the KB. Perhaps it's TKB, IKB, 1KB? Trying to ID this motor.

I thought the following:

T - Tonowanda
02 - Feb
19 - 19th day
1 - ?????
KB (69 396/350 w/ manual trans)
but TKB is 1972 Truck 402

Looking for date code casting as well.

Any insight appreciated.

It does have painted valve covers, not chrome.

[John Brown]

KB is a 69 396 350 horsepower 4B carb Manual Transmission Chevelle or El Camino.

ncrs.org/LIME BOOK pdf (https://www.ncrs.org/ok/LIME_BOOK_2018.pdf)

[69 Post Sedan]

That stamp is TKB…….which is out of a 1972 402 out of a truck with an automatic.

Kurt

[musclecar fan]

Except this stamp has 8 characters instead of the usual 7. That's what is throwing me off. The 1 or T or I before the KB is an extra character. Is this a 69 396/350 or something else. If it was 7 characters without the 1/T/I character I'd agree. But not sure what the extra character means as to ID of this engine.

[69 Post Sedan]

What is the casting date on the block?

[69 Post Sedan]

Late 1969 early 1970….they changed the suffix code from two letters to three. The first letter was a C for car or T for truck…..that’s why yours has three letter for the suffix code.

[Big Block Bill]

X-2, Just like Kurt said, C for Car & T for Truck when they went from (2) letter engine codes to (3) letter engine codes. I would guess the cate date is February 19 1972 You have a 1972 402 with an TH-400 Truck Engine. Bill