SNYDER’S 5.5 head vs 6.1

[Model A Ron]

Originally Posted by alexiskai

Most folks say the difference between the two is not noticeable for normal driving. The only caveat is that the higher the compression, the more critical your timing is, so if you're a set-it-and-forget-it guy on the advance lever, the 5.5 will be more forgiving.

This is good advice. Do you have a 5.5 or a 6.1?