Where is the casting number on a 1965 Ford block head?

The 4 or 6 digit casting number is found around the center exhaust side rocker arm cover bolt or among the rockers on really early heads [pre-68]. Really late heads have #’s like 4417 or such, they might be out closer to the top of the exhaust port. 1965 400/425 motor. Shallow spring seats.

Can a cylinder head be cut in an Oldsmobile?

O-rings can be installed in the head or the block, but preferably in the cylinder head. Milling cylinder heads for increased compression is a relatively easy operation because Oldsmobile cylinder heads are square and can easily be cut without any special fixturing.

What kind of head does a 1967 Oldsmobile have?

So, if your C head has a stamped ID like V2023456G in figures about ¼” tall, that’d be from a 1967 400-4V, possibly a W-30. If no such ID is stamped in, then it’s either a 68-69 C head, or a 1967 head from the left side of the engine. Check the other end of the other head.

What was the engine number on a 1967 C head?

If it’s an A, B, or C head, look for the engine unit number/ID code as detailed in the Blocks section under Big Block Unit Numbers. 1967 C heads had this number; 68-9’s did not. So, if your C head has a stamped ID like V2023456G in figures about ¼” tall, that’d be from a 1967 400-4V, possibly a W-30.

What’s the difference between 1954 and 1955 cylinder heads?

1954 and 1955 324s’ have smaller intake ports and valves than the 1956 engines. 1957 and later cylinder heads will physically bolt on to 1949 to 1956 engines, but the port matchup on intake maniflolds will be off because different cylinder deck heights are used. 1957 and later cylinder heads have larger coumbustion chambers and valves.

Where is the casting number on a 1965 Ford block head?