GT40P heads on 289... What rockers used?

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nittanylion45

New Member

Nov 22, 2006

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Nov 22, 2006

#1

• Nov 22, 2006

• #1

OK, a bit of a strange question... I'm building a low buck 289 engine. I got a great deal on GT40P heads... They are complete with valves and springs.

Can I use the stock 289 rocker arms on these heads? With the stock bolts? Or will I have to buy either stock Explorer rockers or a stud conversion kit?

I'm trying to save some $

Any advice is appreciated

Jim.
j_p_sullivan@comcast.net

 

D

D.Hearne

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Sep 29, 2000

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south louisiana

Nov 22, 2006

#2

• Nov 22, 2006

• #2

Ony rockers that fit a GT40P head are the stock pedestal types. "Cobra" or Crane Energizer roller rockers (1.7 ratio) are a nice addition to these heads. 289 rockers won't work unless you have the heads drilled and tapped for screw in studs and guide plates.

 

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nittanylion45

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Nov 22, 2006

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Nov 23, 2006

#3

• Nov 23, 2006

• #3

Does anyone have any stock GT40P rockers sitting around that they would like to sell?

 

krash kendall

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Nov 19, 2004

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Aldergrove, B.C. Canada

Nov 23, 2006

#4

• Nov 23, 2006

• #4

I believe you will also need a set of headers for the GT40P heads due to the placement of a sensor port requiring a header flange bolt to be relocated.

 

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headgrinder

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Apr 29, 2005

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san rafael ca.

Nov 23, 2006

#5

• Nov 23, 2006

• #5

rockers

I think I have a set of rockers from a set of e7 302 heads at my shop I will check monday when I get to work. you can have them for the cost of shipping
? $10.00 or less. I will send a pm to you monday eve if I find them.

 

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tylerrocks

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Oct 13, 2005

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Big Spring, TX

Nov 23, 2006

#6

• Nov 23, 2006

• #6

krash kendall said:

I believe you will also need a set of headers for the GT40P heads due to the placement of a sensor port requiring a header flange bolt to be relocated.

Click to expand...

You might need headers due to the revised angle of the sparkplug. I used a set of Tri-y with my P's, had to re-route #5&6 primary tubes for sparkplug clearence. But the bolted up just fine

 

krash kendall

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Nov 19, 2004

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Aldergrove, B.C. Canada

Nov 23, 2006

#7

• Nov 23, 2006

• #7

tylerrocks said:

You might need headers due to the revised angle of the sparkplug. I used a set of Tri-y with my P's, had to re-route #5&6 primary tubes for sparkplug clearence. But the bolted up just fine

Click to expand...

Ah yes, that was the header problem I was thinking of. Tyler you really do rock!

 

T

tylerrocks

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Oct 13, 2005

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Nov 23, 2006

#8

• Nov 23, 2006

• #8

werd

 

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nittanylion45

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Nov 22, 2006

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Nov 23, 2006

#9

• Nov 23, 2006

• #9

Thanks!

Headgrinder... Thanks. I'd definitely take them for shipping cost. Let me know if you find them!

I have the headers already. I got a pretty good deal on the jet hot coated MAC shorties on Ebay. I think the fellow is still selling them on there... see:

Item number: 160053405875

Regards, Jim.
j_p_sullivan@comcast.net

 

D

D.Hearne

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south louisiana

Nov 23, 2006

#10

• Nov 23, 2006

• #10

Some of the World Products iron heads have different plug angles too. Beware. One of the guys on the Ranger RPS forums had problems with his tri-Y's and these heads on the #5 port.