to build a 383 out of my old 305 block? i have been told that they are the same block but can a 305 be worked into a 383?

thanks

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Red 87'Z-28 350 tpi,MSD ignition 6al,gutted maf and airbox,
700r4 w/b&m shift kit and cor. servo

 

Nope,
the 350 and the 305 share the same crank, but the bore is much smaller on the 305. There is not enough material in the block to bore much more than .040(?) so I heard. I seen Super Chevy magazine put a stroker kit in one and got it to be about 335 or something around that size.


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87 IROC 350, 3:42 Torsen, pocket ported 083 heads, complete Edelbrock exhaust, Most free mods, Most little mods, aluminum d/s. Edelbrock STB, SSM sfc's, boxed rear suspension pieces, urethane bushings everywhere.
Stock cam, chip, runners, base, and trans
13.94@103mph, 2.25 60'
In the works: ported SLP runners, ported base, Xtreme Cam, homemade suspension pieces, and 27x10 Hoosiers.
Goal: 12.999

 

As a side note, the 305 and 350 cranks are balanced different also, i believe.

 

thanks, so instead of trying to use my old 305 block im just going to have to find a another 350 and bore and stroke it ?

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Red 87'Z-28 350 tpi,MSD ignition 6al,gutted maf and airbox,
700r4 w/b&m shift kit and cor. servo

 

the 305 and 350 are differnet blocks actually. You have to have a 350 block to start with before making a 383

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'89 Formula 383 TPI