Hello,
When some Ford V6 manifolds were up for sale recently, some of you mentioned that you had used them for your Fiero 3800 swaps. What modifications were necessary to allow these manifolds to bolt up to the GM 3800 engine. Are the mods just clearance grinds, port resizing, or do flanges need to be cut off and repositioned?

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RickN
White 88GT 5spd
White 85GT Auto
White 99 F250SD 7.3PSD 6spd
1956 Ford 860 Tractor w/ Freeman Loader
20Ft H&H Tilt Bed Trailer

I think you have to rotate the center flange. It doesnt appear they flow as well as the stock manifolds though.

Search archives for 3.8 mustang
https://www.fiero.nl/forum/A...090219-2-086570.html

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Mike
'86 Fiero 3800 supercharged '86 Fiero SE original
'85 Fiero SE '85 Fiero GT
'84 Fiero SE '84 Fiero Base coupe

[This message has been edited by Mike Gonzalez (edited 12-04-2009).]

bump

On the two outer ports you just need to elongate the mounting bolt holes, on the center one you need to cut it off and turn it then weld back on and elongate the mounting holes as well.
Sounds like a lot of work but it really is not if you have a die grinder and can weld it mis only a few hours work at most.
There is some photos in the link below my sig that show the manifolds. Dan

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Signature compliments of F-I-E-R-O

www.photosled.com/showgallery.php/cat/631
www.photosled.com/showgallery/cat/1583

quote Originally posted by FIEROFLYER: ...There is some photos in the link below my sig that show the manifolds...

Thanks for the info. I saw your pics last night via the thread that MikeG posted.

[This message has been edited by RickN (edited 12-05-2009).]

Thought this might be helpful: https://www.fiero.nl/forum/Forum2/HTML/094840.html