It's really not that question, but I like the subject line. I drive a
'58 MGA that has a 3 main MGB motor - but it has a 1500 head on it.
That's the way it came to me when I bought the car. I have a spare 1800
head, and am concerned that the old 1500 (which I had rebuilt several
years ago) may be cracked. Anyhow, long story short - too late - I
think I'm getting a little more power from the 1500 head due to smaller
combustion chambers (i.e higher compression). Assuming it is still good
(I do have to get it checked for cracks) I'm considering putting the
1800 head on the car. What's the general opinion - will this decrease
or increase my power?? Bigger valves, but more combustion chamber???
How's the tradeoff go there?? Anyone have experience with it??
Phil Bates
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