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#1
10-18-2023, 04:57 PM
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Could someone show/tell me where on a 421 block the engine code is?
Going to pick up a car and look at a couple of 421 engines. I am trying to figure out where the engine code is on the block to tell what version it is. Thanks
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#2
10-18-2023, 05:13 PM
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Passenger side of block up where the head mates.
The 6 digit number could be below the engine code on the early blocks. 
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#3
10-18-2023, 05:17 PM
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Here's a pic of a 1963 421 codes
135U is the block code
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#4
10-21-2023, 05:13 PM
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nice pic of the 421SD . do you own the car it belongs to?
Last edited by muscle_collector; 10-21-2023 at 05:22 PM. |
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#5
10-21-2023, 05:42 PM
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NO.
The pic probably came from here? or internet for sure. From my notes: http://forums.maxperformanceinc.com/...=1#post6372605
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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