aussie parts for a 351M
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12-05-2003, 03:03 AM
Join Date: Dec 2003
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#3
12-05-2003, 03:00 PM
All 351C intake manifolds require adapter spacers to work on a 351M/400 engine.
For compression increase, the "Aussie" cylinder heads you want are the 302C cylinder heads, which were manufactured in Australia for a destroked 351C engine (the 302C). They may give you too much compression, though. In a stock bore 351M with stock truck pistons, the 302C heads will increase CR to about 9.3-9.75:1. That's high enough to cause problems with 92/93 octane premium unleaded.
All of the other Australian Cleveland heads have larger chambers, just like US-made non-quench heads, so they provide no benefit over the common US-made heads.
For compression increase, the "Aussie" cylinder heads you want are the 302C cylinder heads, which were manufactured in Australia for a destroked 351C engine (the 302C). They may give you too much compression, though. In a stock bore 351M with stock truck pistons, the 302C heads will increase CR to about 9.3-9.75:1. That's high enough to cause problems with 92/93 octane premium unleaded.
All of the other Australian Cleveland heads have larger chambers, just like US-made non-quench heads, so they provide no benefit over the common US-made heads.
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