Pontiac 400 exhaust manifold help

[jasonL78]

Figured I'd ask my question here.

Ok Im working on a 70 TA with a 400. It has these huge stock manifolds 3 bolts per side which blows my mind. I'm used to SBC with 6 per side. I bought the stock fel-pro metal gaskets which are real thin. It only solved my leak on passenger side. The driver side is leaking real bad on center port and back port. So today I pulled the driver side manifold off and it was real rusty from years of leaking by. So I put a straight edge across the face of manifolds and the center port is low. So it looks like it is warped some. I tried to true it up the best I could. Installed back into car and still leaking. I'm thinking a thicker gasket will solve my problem what has everyone used.

[300deluxeL79]

some machine shops can mill them flat again

[jasonL78]

Ya that's going to be my last resort.

[L78steve]

Its the only solution.

[Wakepowell]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: L78steve</div><div class="ubbcode-body">Its the only solution. </div></div>

Not the only solution, you could buy replacement from Ram Air Restorations

[earntaz]

Take them to any good machine shop and have them milled -- keep the original part(s) ... TAZ

[L78steve]

I had a pair of SD manifolds cut. Not cheep due to the set-up but came out perfect.

[marxjunk]

id leave them alone..put them up and keep them for the car, and buy a pair of repops..not the ebay/parts place stuff..RARE manifolds as stated above