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Nope. 454 was as big as it got for Chevy, until the 502 crate motors came along in the 90's.
Not true.
Chevrolet had a 510 inch Big Block in 1972.
4.50 Bore x 4.00 in stroke.
Aluminium with no liners.
4 Bolt mains.
Would have been ordered under Special Service Package/Heavy Duty.
You mean as an over-the-counter crate engine, right? Intended for boats maybe? There can't be many of those around. That's my next question, was it ever actually available and sold, or was it just supposed to be available?
Was there an 511 cubic inch engine (upgraded 454) Special order from a dealer or a police package for the squarebody?
Intended for boats maybe?
Yes, they were actually sold.
Chevrolet offered limited numbers of aluminum big block cases with 4.44 and 4.50 cylinder bores both with or without cylinder liners from 1969-1975.
The bare block weighed 98 lbs. a weight saving of 102 lbs. These blocks also had four bosses in the lifter valley for cylinder head hold down studs.
Provisions were made in the block castings for oil coolers and dry sump lubrication systems.
These lightweight alloy cases accepted all Mark IV big block components.