ZL-1 aluminum 427

[El Camino1]

I have a chevy 427 aluminum engine, casting # 3940652, no serial # found, but does have a # 66 stamped on front passenger side down low by oil pan. How many of these were produced and what is the value, thanks

[69SSZL1]

They made about 600 ZL-1 blocks. What kind of condition is it in?

[El Camino1]

Very good condition, I will have to mic the bore

[SuperNovaSS]

Where did the 600 number come from?

[PeteLeathersac]

And does anyone know when Yenko first cast his block w/ the 'Yenko' in the casting....before or after GM made the Winters ones available? ~ Pete

[Mr70]

I think it was after Pete.Once Don bought the rights to it in the mid 1970's.

[PeteLeathersac]

I thought it was later too but think I read somewhere once that it was before? . Also last weeks posting of this months ZL1 feature car that has a 'Yenko' one in it sounds like he may have put it in soon after he got it when he set the orig motor aside? ~ Pete

[El Camino1]

AGAIN....WHERE DID THE 600 COME FROM?

[69SSZL1]

Complete and partal engines: 283
Aluminum blocks:279
Yenko orig blocks:30
Yenko revised blocks:900
Info from Winters factory page in Ed Cunneen's book.
I hope I am reading it correctly.

[El Camino1]

So thar means there were originaly 1,492 aluminum 427 blocks produced in 1969? Just curious