Thread: 283 in a 91 nissan

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ok i also fount a nother 283 block im my grandads building its is bored like .60 over but evey one is tellin me to bore it to 4.00 is this safe its like .125 over i was like it dont sound safe but a lot of the old guys arounf here say the old 283 blocks like 68 and older was made with really thick walls so you could bore them .125 over and be good is this true

well considering 1967 was the last year fo the 283 there is no 68 and later blocks. yes you can bore then .125 the best blocks are 61-62 and up. i have a 64 283 in my car and its bored .125 and dosnt run hot or anything goofy. and a few mid 60's ones at home ready to be punched .125

Originally Posted by chevymanc1079

ok i also fount a nother 283 block im my grandads building its is bored like .60 over but evey one is tellin me to bore it to 4.00 is this safe its like .125 over i was like it dont sound safe but a lot of the old guys arounf here say the old 283 blocks like 68 and older was made with really thick walls so you could bore them .125 over and be good is this true

It does not sound safe because it is not.
If GM wanted the 283 to 4.0 they would have used that block.
Instead they came out with the 327 that has the 4.0 bore.