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440 source heads

And thats the one I'm choosing to run. Help with the squeeze factor. The fresh engine has 1.969 compression height which gets me into the mid 9's on compression. Additionally, the block got decked to get it squared up. With that combo my static rate will be in the 10's but with the thermal differences between iron and aluminum, it will be safe for Cali 91 octane swill. May even try some 85 later on to see if its ok or complains.
 
To the original thread, doesn't anyone stock valve seats anymore lol
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Not yet, give Summit a call, their customer service is amazing, they’ll give it to you. Have them separate your order so you can get $120 off each head.
Looks like E Street are only sold in pairs at Summit, but if you put a single RPM head in your cart, the Promo is $60.00.
 
Looks like E Street are only sold in pairs at Summit, but if you put a single RPM head in your cart, the Promo is $60.00.
Oh, I see, that’s a good deal for a pair. That’ll be easier for Summit’s customer service since the order went through, to save $120.
 
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