can anybody help me identify a 1970 lt1 ctb complete engine. i purchased it from a guy who claimed he removed it from a wrecked 1970 ralley nova or may have been a yenko nova the side decals could have been changed on the car. it is a vo626ctb june 26th 1970 built engine, there is a 7 digit number stamped before engine suffix front pad also either 5407574 or s407574, no vin stamp by oil filter. did some research on team camaro they feel because of possible s it may be a corvette or a bad stamp. i dissagree because it has the camaro/yenko ctb and original dated camaro/nova waterpump f220 not covette pump it has a different part # ,and after a complete rebuild engine had all correct original parts also. CAN ANYONE HELP ME IDENTIFY THANKS RON.

here's what i found:

CTB 1970 350 high perf, 4 spd LT1 350 4 F X A
CTB 1972 400 man trans., A.I.R. 4 Caprice
CTB 1974 400 t/h trns, pol/taxi 175 2 Caprice
CTB 1975 400 a/t 175 4 A

scroll to view: http://www.nastyz28.com/gm-chevy-codes/chevy-engine-codes-suffix-3.php



hope i helped, that's all i got ;)


Welcome & Good Luck ;)


Johnny

Without a time machine, or a stack of documents to verify anyone's claim as to originality, any forty year old combo is suspect no matter how original it appears. Casting numbers identify parts, time and date stamps cast into the parts tell you when they were cast (which is usually about a week or two before assembly for normal production cars). That combined with the cowl tag identify what motor you have. As to unique options; the parts at hand determines what each RPO code reflects. You may have to disassemble the motor to determine cam and pistons (since carb and water pump are external). With the help of Colvin and other sources you can be relatively reassured that you have any given RPO coded motor your heart desires; but that is not the same thing as saying it "belongs" in a specific chassis. Only ID stamps and documentation can help there and many motors are restamped (for a number of reasons over forty years of service) and documentation is still the gold standard.

If you have a hot rod, enjoy it; if you are buying it for an investment I would suggest stocks, even in today's market they will return more than "investing" in a collectable car over the long run.

Big Dave

Just would like to identfy this motor as a z/28 motor or a yenko motor or other special order nova or camaro. If any of the information especially 7 digit serial # or partial vin could be eplained by someone who may have encoutered a block stamped this way before. I have never seen a original factory partial stamp like this ever on any small block before. I am shure the VO626CTB IS A ORIGINAL STAMP it matches block cast date. Could the partial vin be a dealer installed serial # maybe. i am shure the CTB suffix is a yenko lt1 or a z/28 motor already, but i am very curious as to the originality of the car this engine may have came from if anybody knows thaks ron.

The date is too late for a Yenko deuce. The last ones built are 06B. The LT1 was also available in the Corvette. Plant code for 1970 is S. So I will guess it is from a 70 4spd Corvette. Earl

I agree with Earl, S is St. Louis corvette plant.