stillridin

Does any one have any experience or knowledge with these heads? Good? Bad?302/351W "Z-HEAD" ALUMINUM - ASSEMBLED 63CCM-6049-Z304DA*

67mustang302

They're ok, but for the money you're much better off with AFR or TFS. You'll also get much better performance out of those than the Z head.

barnett468

hello;

it depends completely on the application. they are perfect for some apps but not perfect for others. it would help if you told us exactly what engine they are going on and cam size and intake type and rear gear ratio and desired type of performance.

the afr and tw brand of heads mentioned are killer.

edelbrock makes a nice affordable set that flow around 25% more than a set of stock heads. the afr 165's and tw 170's flow more than the eddy heads, however, bigger is not always better.

check these out

http://www.edelbrock.com/automotive/...treet-sb.shtml
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stillridin

sb 427 twin Precision Turbos .82 a/r 57-62mm. PT 5858cea's
cam lift int/exh 640
int 109 252
exh 119 244
Not sure on the intake. I'll call Holly and see what they recommend. I want to do their Dominator EFI. 327 gears. Weekend driver, sometimes track 1/8 and 1/4> Still got a long way to go but i'm piecing it together. These heads are brand new and half price.

barnett468

depends on you goal but if you turbo it. they will be ok. the flow similar to the AFR 185 heads.

if you want a monster then but afr 205's but it will have a bit less bottom end.

they may require special headers because they have a raised ex port.

the car will be a pig with 3.23 gears.
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