JK's 70 SS Posted April 24, 2017 Share Posted April 24, 2017 Does anyone know what series of casting #'s were stamped on the 454's SS - I can read TO71........CGW - can't make out the rest Any help? Quote Link to comment Share on other sites More sharing options...
JK's 70 SS Posted April 24, 2017 Author Share Posted April 24, 2017 3969854 on the upper rear of the block Quote Link to comment Share on other sites More sharing options...
JK's 70 SS Posted April 24, 2017 Author Share Posted April 24, 2017 Found more info - CGW is Corvette 454 - LS5 HP - the casting is correct for 1970 BBC. It does not have the air pump system, nor auto-level. I think since the car was made in Flint, the non-emissions motor came from Canada...thoughts? Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 24, 2017 Share Posted April 24, 2017 On the pad it should have the code, CRN. The block number should be 3963512. 2 Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 24, 2017 Share Posted April 24, 2017 The block number you posted is for a 402 cubic inch block. Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 24, 2017 Share Posted April 24, 2017 Is it possible someone restamped a 402 block with a 454 code. Please post a picture of the pad on the front of the block. Quote Link to comment Share on other sites More sharing options...
1970mcss Posted April 25, 2017 Share Posted April 25, 2017 My 70 is stamped TO227 CRN, I haven't located the part number Quote Link to comment Share on other sites More sharing options...
LS5 Posted April 25, 2017 Share Posted April 25, 2017 Here you go, 1970 engine codes for 402 and 454 engines for chevelle and monte carlo not inc Corvette. 402 ↓ CGR 402-4 330-LS3 Manual-3/4 Found on Vintage Vehicle Services Report CKN 402-4 330-LS3 TH-400 CKO 402-4 375-L78 Manual-4 CKP 402-4 375-L78 (w/L89) TH-400 Aluminum Heads CKQ 402-4 375-L78 Manual-4 Heavy Duty Clutch CKR 402-4 330-LS3 Manual-3/4 CKS 402-4 330-LS3 Manual-3/4 Heavy Duty Clutch/LS3 CKT 402-4 375-L78 (w/L89) Manual-4 Aluminum Heads CKU 402-4 375-L78 (w/L89) Manual-4 Heavy Duty Clutch/Aluminum Heads CTW 402-4 350-L34 TH-400 CTX 402-4 350-L34 Manual-3/4 CTY 402-4 375-L78 TH-400 CTZ 402-4 350-L34 Manual-3/4 Heavy Duty Clutch 454 ↓ CRN * (2) 454-4 360-LS5 TH-400 ****Monte Carlo**** CRQ 454-4 360-LS5 TH-400 CRR 454-4 450-LS6 TH-400 CRS (1) 454-4 450-LS6(w/L89) TH-400 Aluminum Heads CRT 454-4 360-LS5 Manual M22 CRU 454-4 360-LS5 Manual M22 Heavy Duty Clutch CRV 454-4 450-LS6 Manual M22 CRX 454-4 450-LS6 Manual M22 Heavy Duty Clutch CRY (1) 454-4 450-LS6(w/L89) Manual M22 Aluminum Heads/Heavy Duty Clutch Darren 2 Quote Link to comment Share on other sites More sharing options...
LS5 Posted April 25, 2017 Share Posted April 25, 2017 Block ID 3963512 Late 1969 454 Engine Block number 3963512 All 1970 454 Corvette,Chevelle,Nova,Monte Carlo,El Camino etc 3969854 All 396 and 402 for 1970. You Can re-stamp a Block Pad or passenger forward Head Pad to read what ever you want but try to copy GM's Font and Spacing.... Good Luck.... YOU CAN NOT REPLICATE A CASTING NUMBER ITS IN THE BLOCK WHEN CASTED. Darren 2 Quote Link to comment Share on other sites More sharing options...
LS5 Posted April 25, 2017 Share Posted April 25, 2017 CGU was also used as a 390hp engine but was only in the Impala and Caprice and a standard Orange Block. The corvette 454 390hp engines in a CGW were painted Red in 1970. General Motors in Canada (Oshawa) did have and made those cars as well in 1970 with those two codes but were only 454 cars. Now it has been proven that when the strike was on, Oshawa ran out of 454's for the 11 Chevelles waiting to be delivered and threw in CGW and CGU 454's that were left over during the strike. Those chevelles are worth big bucks, now it was not known if any Monte's got those two engines or if they got all the 454's before they ran out none have ever shown up but we have a couple of floaters out there in chevelle and monte carlo that got M21's instead of M20's and visa versa also due to the strikes in Canada and The USA. Darren Quote Link to comment Share on other sites More sharing options...
JK's 70 SS Posted April 25, 2017 Author Share Posted April 25, 2017 So can a 3969854 be a 454 because of the strike/shortages? Quote Link to comment Share on other sites More sharing options...
JK's 70 SS Posted April 25, 2017 Author Share Posted April 25, 2017 Can I see a pic of a CRN #? Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 25, 2017 Share Posted April 25, 2017 I would say it is not a 454. Post a picture of your engine pad with the stamped numbers. It most likely will look like a re stamped block. Quote Link to comment Share on other sites More sharing options...
JK's 70 SS Posted April 25, 2017 Author Share Posted April 25, 2017 Ok - here we go.....first off thank you everyone or helping me out with the CSI. Second, what I have is an SS CLONE....sold to me by a "friend" a long time "friend".....and as his friend when he needed "Johnny on-the-spot", jumped through all kinds of logistics to get his rides ready. The stamped id info on the pad has definite grind marks between the first set and the newly stamped CGW. . The rear casting does not lie. What I have is a 402 Monte Carlo with SS badging, right down to the SS button on the steering wheel. Ok I can absorb that - what has me ballistic - is the fact that my "friend" knew this and presented it to me knowing it was fake. Dude, have some integrity. I spent almost 5 yeas in Iraq and this car was one of my prized achievements......a kind of thank you to me. Some people's kids....... Again thanks to everyone - this site is AWESOME! ...JK Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 25, 2017 Share Posted April 25, 2017 Maybe he was not the owner that re stamped that block. He may have bought it that way. It may not even be an original big block car. I would let him know what you had found out. Then see what he has to say. Quote Link to comment Share on other sites More sharing options...
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