Very interesting.

Is your belief that this is supposed to be an LT-1 spec engine? Does it appear reasonably stock or is it just the block? Is it a 4 bolt main block?

You probably already know that 010 blocks were used just about in every small block application through the 70's, so that doesn't tell us much.

If it a long block I'd like to see the combustion chambers to see if they've been cut for the intake valve unshrouding.

I want to add yenko deuce also has the CTB in 1970. Now a partial vin would determine a car line for the engine.

hi

completely stock (exception of headers/ carb and distributor) and was all together in my car
just took it out of the car and disassembling to re-bearing and ring at the same time as freshing my yenko deuce LT1 engine

yes it is a 4 bolt main block
block also has 010 and 020 marking on it

LT1????? ...........i dont know
202 heads on it 2110 intake
1182 crank

will be taking the heads off this week to look at them/ the rods and pistons
rods are marked "X" on the caps (as i do have the pan off the engine

thx
chris

Chris:

See if you can get a clear pic of the casting date. Usually on the back part of the block close to the bell housing flange, on passenger side.

That and a good pic of the engine assembly stamp would help.

hi

will do

thank you

regards
chris

If it is a 70 Z block it should have 2482 on center 3 main caps. Tonawanda blocks have no 1/4” front plug just above timing cover, but those can be tapped & installed. Also “X” rods are not correct, those were mid 70 issue.
How about posting a picture of pad Chris?

hi
as mention prior

will get pics...but wont be until weekend...as im away til then

thx
chris

I'd like to see a good pic of that pad stamping. The T does not seem legit.

Here are the other small block 'CTB' Chevrolet codes:

1974 400cid /2bbl/150 horse (Cop cars)

1975 400 cid/4bbl/175 horse/turbo 400 (Chevelle/Monte Carlo)

1978 305 cid/ 145 horse/ 2bbl./TH350 (Monza)

By the way, I ask for help from guys here way more often than not because I do not "know it all". Happy New Year.

2 internet sources state CTB for 1970

CTB 1970 350 high perf, 4 spd LT1 350 4 F X A

and

CTB 1970 350 350 4 high perf, 4 spd

will take pics of prefix and block casting # saturday morning

regards
chris