Dynomax full length header help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1966gmc · 11-23-2007, 10:15 PM

I have a set of Dynomax full length headers pn 85003.I have read that they fit 64-9? chevy/gm trucks.They do not specify mt/at or just at.What exactly do I need to do to the bell crank to get them to fit? Just take it off and slip it thru the number 5 and 7 tubes?
Please help me out fellows.I may try to install them tomorrow while teh turkey is cooking

1966gmc · 11-23-2007, 11:23 PM

Anyone?

60ratrod · 11-24-2007, 03:58 AM

i'm assuming that you either did the v8 swap conversion or yours already had the v8 in it. well i would look to see what you might need to move and reconfigure. just keep in mind that you are going to have to keep anything that is meltable out of the way. i would also switch to some header shorty style spark plugs. they're designed to be shorter for going behind the headers. it sucks when you keep frying plug wires on the headers.

PrerunnerRob · 11-24-2007, 09:57 AM

I had a set of heddman headers on my truck, and they cleared, but barely! On mine they grouped together in the center, went down, and then went into the collector towards the rear of the engine.

I just looked at those on summits website, it looks like you are going to have to play with the clutch linkage to make it work. Keep us updated please!

1966gmc · 11-24-2007, 12:31 PM

Quote:

Originally Posted by PrerunnerRob

I just looked at those on summits website, it looks like you are going to have to play with the clutch linkage to make it work. Keep us updated please!

Thats what Im trying to figure out about the linkage.It looks like if I remove the bell crank and slip the header in,I may have enough room for the linkage to operate properly.But then again,the bell crank is far enough down on the block/frame,that looks like where the tubes of the headers come in together.I was goin to start on it today but I got up too late and it looks like it is goin to rain soon

**Captainfab** · 12-03-2007, 12:31 AM

I've not used those exact headers' but they look similar to those I have used. What you'll probably have to do is move the arm on the bellcrank that the rod from the pedal attaches to. It will need to be moved closer to the engine. Then of course the rod will have to be modified or a new one made to reach the arm in its new position. I can take a pic and post if that will help.

11-23-2007, 10:15 PM	#1
1966gmc Why does it taste purple? Join Date: Sep 2007 Location: Cambridge Md Posts: 621	Dynomax full length header help I have a set of Dynomax full length headers pn 85003.I have read that they fit 64-9? chevy/gm trucks.They do not specify mt/at or just at.What exactly do I need to do to the bell crank to get them to fit? Just take it off and slip it thru the number 5 and 7 tubes? Please help me out fellows.I may try to install them tomorrow while teh turkey is cooking

11-23-2007, 11:23 PM	#2
1966gmc Why does it taste purple? Join Date: Sep 2007 Location: Cambridge Md Posts: 621	Re: Dynomax full length header help Anyone?

11-24-2007, 03:58 AM	#3
60ratrod yes, i do Join Date: Jun 2007 Location: Spokane, wa Posts: 2,734	Re: Dynomax full length header help i'm assuming that you either did the v8 swap conversion or yours already had the v8 in it. well i would look to see what you might need to move and reconfigure. just keep in mind that you are going to have to keep anything that is meltable out of the way. i would also switch to some header shorty style spark plugs. they're designed to be shorter for going behind the headers. it sucks when you keep frying plug wires on the headers. __________________ ERROR 404....... SNAPPY COMEBACK NOT FOUND _______________________________________________________________________________________________ -60 Chevy C10, dead 350/good th350 combo, sitting on a 76 c10 blazer frame, built from 11 different vehicles "the abomination" -07 gmt900 silverado 1500 lt xcab z71, granite blue -81 suzuki gs650g "shelah"- current project -81 kz1000m1 csr "sarge" -next project (just beautification) -07 kawasaki vulcan classic vn900

11-24-2007, 09:57 AM	#4
PrerunnerRob Registered User Join Date: Jan 2007 Location: San Jose Posts: 847	Re: Dynomax full length header help I had a set of heddman headers on my truck, and they cleared, but barely! On mine they grouped together in the center, went down, and then went into the collector towards the rear of the engine. I just looked at those on summits website, it looks like you are going to have to play with the clutch linkage to make it work. Keep us updated please! Last edited by PrerunnerRob; 11-24-2007 at 10:03 AM.

12-03-2007, 12:31 AM	#6
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Dynomax full length header help I've not used those exact headers' but they look similar to those I have used. What you'll probably have to do is move the arm on the bellcrank that the rod from the pedal attaches to. It will need to be moved closer to the engine. Then of course the rod will have to be modified or a new one made to reach the arm in its new position. I can take a pic and post if that will help. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE



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