Thread: chev 302's back from the dead

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I think I would rather try my luck with boring a 283 block to 4" . And running the stronger S/J 327 rods that still only have 11/32 rod bolts . The 327 I am making is a L/J 1971 350 block with 1972 307 crank it has the stronger rods with 3/8 sps bolts . COOL

Originally Posted by tango

I think I would rather try my luck with boring a 283 block to 4" . And running the stronger S/J 327 rods that still only have 11/32 rod bolts . The 327 I am making is a L/J 1971 350 block with 1972 307 crank it has the stronger rods with 3/8 sps bolts . COOL

Yeah you could bore your 283 .125 thousands over to make a 4" bore. you could also bore your 307 to a 4" bore .125thousands over since its a large journal 283 block with a large journal 327 cast iron crank. all those rods are the same in those stock motors there all a 5.7 cast iron rod with 3/8 bolts and rated for only so many RPMs before they fly apart. the only thing chevrolet really changed was the piston pin height for the different length crank strokes but otherwise all used a 5.7 rod.

Originally Posted by speedy55779

Yeah you could bore your 283 .125 thousands over to make a 4" bore. you could also bore your 307 to a 4" bore .125thousands over since its a large journal 283 block with a large journal 327 cast iron crank. all those rods are the same in those stock motors there all a 5.7 cast iron rod with 3/8 bolts and rated for only so many RPMs before they fly apart. the only thing chevrolet really changed was the piston pin height for the different length crank strokes but otherwise all used a 5.7 rod.

OH,NO!!!!HERE WE GO AGAIN!!!

Originally Posted by erik erikson

OH,NO!!!!HERE WE GO AGAIN!!!

Hey tango started it