Re: 413 head swap

[chymar01@xxxxxxxxxxx]

the valve will be fine. max wedges used a 1.88" valve with a small bore notch so the 1.74 should be fine.
the later heads will probably drop you a full point, or down to 9:1ish. keep in mind these are only the numbers on paper as what actually came out the door of the factory was often way off. usually 10:1 was more like 9 or 9 1/4:1

-------------- Original message -------------- 
From: Sean B <polecat2@xxxxxxxx> 

> 
> Is the bore on a 413 too small for the larger exhaust valve on later 
> heads? I'm pretty sure it won't hit, but will it be close enough to the 
> bore that I'd have to unshroud the bore? Also, how much will my 10.10-1 
> factory compression drop if I switch to open-chamber heads? 
> 
> Thanks, 
> 
> Sean 
> 
> 
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----
Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.