[Newmy]

The date code?

[Joe's Garage]

Originally Posted by Newmy

Thank you for the info
Where can i find the date code?

Date code is back near the distributor close to the big '70'.

First letter is month cast (A = Jan, B=Feb, etc.)
Next to digits are day of the month. (01-31).
Last digit is year. 9 = 1969, 0 = 1970, 1 = 1971, etc.)

D 01 1 would be April 1st, 1970.

Red circle in the pic.

[Newmy]

Originally Posted by ponchjoe

Heads aren’t original to a 70 or 71 400. 46 heads in 69 are small valve press in stud 10.5:1 heads. Not a desirable head. There are also 46 heads from 73 and they are larger chamber if I remember correctly. Date codes would let you know which they are.
Good block is all you really have there

Date codes are present on heads too Im guessing

[Newmy]

Originally Posted by Joe's Garage

Date code is back near the distributor close to the big '70'.

First letter is month cast (A = Jan, B=Feb, etc.)
Next to digits are day of the month. (01-31).
Last digit is year. 9 = 1969, 0 = 1970, 1 = 1971, etc.)

D 01 1 would be April 1st, 1970.

Red circle in the pic.

You mean ‘71 right?
Thank you very much for info.
Im going to check date codes on heads to see which year they are from. Which will tell me small or large chamber, correct?

[Joe's Garage]

In the example given, the production date would be April 1st 1971.

But I'm pretty sure that all the 9799140 blocks were cast in 1970. Thus the freudian slip.

Sorry.