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  C9-D0** Heads- Have to ask how they compare

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Author Topic:   C9-D0** Heads- Have to ask how they compare

Posts: 278
From: USA
Registered: Oct 2001

posted 12-30-2002 09:53 PM     Click Here to See the Profile for MidLifCrisis   Click Here to Email MidLifCrisis     Edit/Delete Message   Reply w/Quote
I want to do a mild rebuild on my '67 289. I know heads can give some great gains. I can't handle the $1000+ for aluminum heads. Have been looking at GT-40P, but finding headers sounds like a hassle.
Came across an old Hot-Rod mag and they suggest the C90E or D0OE or D1OE. I found the valves were approx the same size as the GT-40P and the ports are larger than stock 289. I figure they probably have the thermactor bump in the exhaust that will need removing.
SOOOO, question is are they worth tracking down a set? How much should they be milled to maintain 9-9.5 to 1 compression? OR are the GT-40P heads for $550 and a set of $250-$300 set of headers the way to go? Thanks in advance. Charlie

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Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000

posted 12-30-2002 10:23 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote

I'd suggest a pair of World Products windsor jrs. Best bang for the buck and your headers will work too. Even Sam has them.


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Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 12-30-2002 10:43 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote

Alex Denysenko
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NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
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Quote #1: "I never met a magazine mechanic I liked."
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Rory McNeil

Posts: 1210
From: Surrey, B.C. Canada
Registered: Nov 2000

posted 12-31-2002 12:18 AM     Click Here to See the Profile for Rory McNeil   Click Here to Email Rory McNeil     Edit/Delete Message   Reply w/Quote
On my 302 Fairmont streeter, I replaced the original 69cc stock heads, with a set of rebuilt, but stock 69 351W heads about 6 years ago. In my case, the Windsor heads actually increased my compression by almost 1 full point, due to the chambers being about 10 cc`s smaller. The car picked up 6 tenths in the 1/4 mile with the 351W heads, although I think it was more due to the extra compression than the slightly bigger valves & ports, but I can`t prove that, one way or the other.

78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker under construction, 302 5 speed
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd

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Posts: 170
From: clearlake california
Registered: Dec 2002

posted 12-31-2002 12:53 AM     Click Here to See the Profile for sic67coug   Click Here to Email sic67coug     Edit/Delete Message   Reply w/Quote
what kind of horse power increase will you get with those heads? ok scenario: stroked out 289-331 .30 over world heads and a wicked cam some headers and roller rockers what kind of horse would i be putting out?

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