305to 350
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From: ft.wayne indiana
Car: 84 camaro
Engine: 72 chevy 406 sbc
Transmission: 700r4
Axle/Gears: 3.42 eaton posi
305to 350
doing a swap from a 84 305 to a 72 chevy 350,now the stock exhaust manifold on pass side is causing a prob ,the back bolt hole does not line up? driver side did just fine.help
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
3rd gen exhaust manifolds use a "7th" bolt hole on that back bolt. Earlier heads didn't have it.
Odds are about 100:1 that your 305 heads are better for that 350 than the heads that came on it. Best options are (in ascending order): 1) Put on headers; 2) put the 305 heads on the 350; 3) put the 305 heads on the 350 and install headers.
Odds are about 100:1 that your 305 heads are better for that 350 than the heads that came on it. Best options are (in ascending order): 1) Put on headers; 2) put the 305 heads on the 350; 3) put the 305 heads on the 350 and install headers.
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From: Charles County, Maryland
Car: 2000 BMW M5
Re: 305to 350
Worst case scenario, just run it. If the manifold is flat it probably won't leak. I wouldn't go to the trouble of putting 1.8x valved heads on a 350
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Sep 10, 2015 09:07 PM