LS-7 Crate Engine

[70judge]

hi I think they made the l s 7 from 1971 to 1973. my l s 7 heads had a 71 and a 72 casting numbers. my head were 990 124 cc chambered not 119 chambered also my lower end had a nitrated crank dimpeled rods and forged domed pistons. and a 4 bolt main. It had every high perf. part gm had made at that time.

[PxTx]

Are you sure you that engine is an LS7? If you look in the lower right hand corner you can see it indicating its a 4/27

[Astock]

It's a LS7.Check the casting date on the block and 990's.I bet it's around mid 80's.There should be a off road use only tag if you took it out of the crate.I bought a couple of the last L-88's in 1980 and the blocks were 289 castings 454 blocks dated 1973.

[Yellow 69 z28]

The casting looks like a 1978 but I am going to check further. There are three sets of heads, 1st set are 3946074's with "9.7.71" and "1.3.69". and 2nd are 14096188's with "F130" and "G090" and last is a set of 6272990's with "B-26-74" and "C-1-74". The 074's and the 990's are assembled and the 188's are bare. The 074's have been used but briefly. Here's the casting date on the block.

I have a feeling that this motor will rock!

My next quest would be pull the cam and check the number and I may have to check the crank.

Can somebody PM me with a esitmated value?

[Yellow 69 z28]

Here is the piston casting. Someone has said it could be a ZL-1 casting number.