[chuckies76ta]

Hi All: What to talk to anyone who is running Round port Doug's Headers (D-581) on a 76 Trans am with Standard tranny.

What to know how they fit?

Any issues?

Ground Clearance?

These will be going on a 455 with #197 round port heads..

My other option will be to go with Ram Air Manifolds 2.45" RM-4-OS

Thanks for your input.
Charles

[Rack776]

I also want to know what is the best round port hedder to use on a 75 T/A
455 with 72 455 H.O. 7F6 round ports and a 4 speed trans.
Is it still possible to use the reverse lock out rod with round port hedders?
I can use it with the D ports that are on the car now.

I'd like to stay with tube hedders instead of manifolds
The Dougs look good to me too but I havent seen any in person.
The Hooker Super Comps look to hang down pretty far in photos
is there any advantage or disadvantage to using Dougs vs. Hooker vs. Heddman?

[BAD455TA]

From personal experience I wouldn't go with long tubes. I have the Hooker Headers and from what I understand RAM AIR manifolds flow just as good. I have a 76 and there just isn't very much room for long tubes. Here are some things you will have to worry about:
Clutch Linkage-complete modification...forget about hydraulic
Starter clearance-nuf said
Reverse Lockout-I hear it's possible to still have it (I don't)
Oil Filter-there is a special size I can't remember it off the top of my head. You may even need a different filter housing.

I love the look and sound of headers but if I could have gotten some shorties to do the trick I would have.

Keep in mind I have the Hooker Headers. There is plenty more info on this in the Exhaust Tech Forum.

Good Luck

[chuckies76ta]

Thanks.. The Hookers Hustlers seem to fit really well on my friends 78 T/A.. The smaller oil filter is the same one used in my 2000 GMC 6 liter engine..

Have the small mini starter.. Reverse lockout has to be removed.

Charles