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Exhaust question.

  
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Exhaust question.

 
smittysmith smittysmith
New User | Posts: 5 | Joined: 07/13
Posted: 07/18/13
06:14 PM

Just wondering if stock 305 ex. manifolds would fit on a 350 with vortec heads.Any and all advice welcome, and thanks in advance.
                                             Bob.  

68scott385 68scott385
Guru | Posts: 1990 | Joined: 10/09
Posted: 07/18/13
06:33 PM

I going to say yes because both manifold look the same but you should look at the exhaust port shape to make sure they are the same.  
68scott385 68scott385 68scott385

smittysmith smittysmith
New User | Posts: 5 | Joined: 07/13
Posted: 07/19/13
05:32 AM

Thanks Scott. I thought they should,but I don't have the 350 yet. I will check when I get it. If it looks like the flow will be impeded in any way, I'll probably go with some headers. Thanks again, Bob.  

waynep712222 waynep712222
Enthusiast | Posts: 251 | Joined: 03/13
Posted: 07/19/13
07:28 AM

one thing...

there are 6 bolt exhaust patterns on SBC motors..

there are 7 bolt exhaust patterns on SBC motors.

there are also 8 bolt patterns on SBC motors..

-o0o--o00o--o0o  six bolt
oo0o--o00o--o0o  seven bolt pattern
oo0o--o00o--o0oo eight bolt pattern.

one has to look at the gasket face of the exhaust manifolds..

the passenger side usually is where the 7 bolt pattern is found..

on the gasket face.. of a 7 bolt exhaust manifold.. you will see this pattern.

o0o--o00o--o0 o    notice the gap. that would show up near the back of the head on the passenger side..

if you end up with 6 bolt heads... and have a 7 bolt exhaust manifold.. enginequest sells a 1/4" thick adaptor plate with one counter sunk location next to the gap. so you can use a 7 bolt manifold on a 6 bolt head.. #AH034

!Bdw2sewbwk~$(Kgrhqeh Dserer0u9tubk4jis7pkq~~ 12  

smittysmith smittysmith
New User | Posts: 5 | Joined: 07/13
Posted: 07/19/13
08:33 AM

That is valuable information!Much appreciated,thanks Wayne.Bob.