RW>Not likly.  283's were hard pressed to make it to a 4" bore.  That'd be an 
1
RW>to bore out.  You'd need a perfectly cast block. I remember a lot of them 
go
RW>to 292, but hardly any 301's from 283's.  Some, but not many, and those 
were
RW>streetable due to the heat warping the thin cylinder walls.
Sorry to disagree, but that's just not right. We used to routinely make
301s out of 283s. (You would buy a 327 master kit, the only
additional cost was a small charge for the extra over bore.) There were
hundreds if not thousands of them running all over SoCal in the '60s.
For a while at San Fernando drag strip they had a "301 in a '55 Chevy"
class. The entire Junior Fuel class was designed around the 283 punched
to 301, although most guys went to a 327 with a 283 crank when they
became more available (in the mid- '60s), partly because you could
punch those another .060". But on the street a punched 283/301 was VERY
common. Core chift has always been a problem with Chevy blocks, and
occasionally you would run into one that was too far off, but you culd
usually tell by looking at the lifter bores/bosses. 283 blocks were so
cheap in those days, you'd just throw it away and find another .....
Damn near everyone claimed they were running a 272 (.060 over 265) but
they were 283/301s. You could even bore a few real late 265s a quarter
over to make them 301s, but that was REAL chancey. Far better to pick up
a 283 for about 25 bucks.
Jackson
---
 þ SLMR 2.1 þ Speed costs money - How fast can you afford to go?
--- BMW Motorrad /2
---------------