they could have either 1.94 intake 1.50 exhaust or 2.02 intake 1.60 exhaust
The combustion chamber size of the heads with the casting number 376450 is 60cc. It is possible to install larger valves.
There 194 heads 1970 to 1980 heavy cast iron heads
The GM LT1 heads with casting number 10128374 typically feature 1.94-inch intake valves and 1.50-inch exhaust valves. These specifications are standard for the LT1 engine, which was part of GM's small-block V8 family used in various vehicles during the 1990s.
The GM heads with casting number 3978487, commonly found on small block Chevrolet engines, typically come with 2.02-inch intake valves and 1.60-inch exhaust valves. These heads were used in various performance applications, particularly in the late 1960s and early 1970s. Always verify specific applications, as variations may exist based on production year and modifications.
they came with "186" casting number heads.........
The casting number for LT1 cylinder heads is typically 14096217. This number can be found on the side of the cylinder head and is specific to the heads used in the 1992-1997 Chevrolet LT1 engines. It's important to verify the casting number to ensure compatibility with LT1 engine components.
You need to get a Casting # book and look up which heads you have.
The valve size on SBC (Small Block Chevrolet) heads with casting number 354434 typically features 2.02-inch intake valves and 1.60-inch exhaust valves. These heads were commonly used on high-performance applications and are known for their good airflow characteristics. Always verify with specific engine configurations, as variations can exist based on modifications or specific engine builds.
The chambers are 60cc. The heads are from 77-78 307 engine.
Find the casting number on them... type "GM (insert casting number)" into a search engine and you should find what you're looking for.
yes there are 8 intake valves and 8 exhaust valves in the set of heads
Heads: Casting Number 3904390 - 1966-68 427, Intake 2.06, Exhaust 1.72, Closed Chamber, 98.4 CC.