VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1912-1928 odd question...................

I am on the aaca forum and somebody suggested that the 490 and FB heads of 1922 are identical. Is that at all possible?

I find it hard to believe.

thanks!

24hp vs 37 hp

490 head is single port exhaust and FB head is three port exhaust. The heads have the same head bolt pattern as far as I know.

Yes, the head bolt pattern is the same. For example, the Filling Station sells a new head gasket that works for 1916-1928.

Cheers, Dean

so both heads can be interchanged for use whether or not single or three port?

really?

Although I have not done this, a lot of other folks put newer heads on older engines. The single exhaust port heads are prone to cracking and when they did, a lot were replaced with the dual exhaust port '28 heads.

I have heard that the push rods are not the same length for all the 4-cylinder engines. There might be other factors to consider also.

This topic would probably get more opinions in the Speedster forum, since they modify the 4 bangers for speed and power. Back in the day, the hot rodders used to put a 1923 three port OLDS head on the Chevy blocks.

Cheers, Dean