I have a 350 rocket engine can I put 455 heads on it
October 4th, 2020, 02:21 PM
#2
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Join Date: Feb 2013
Location: Phoenix, AZ
Posts: 13,797
Can you? Yes.
Should you? No.
The BBO intake port sizes won't match up with the intake manifold, and the 82cc heads will drop the compression ratio significantly unless you have a 73-76 engine withe #8 heads that are 79 cc. The earlier 68-72 SBO heads are typically 68cc.
Should you? No.
The BBO intake port sizes won't match up with the intake manifold, and the 82cc heads will drop the compression ratio significantly unless you have a 73-76 engine withe #8 heads that are 79 cc. The earlier 68-72 SBO heads are typically 68cc.
October 5th, 2020, 07:06 AM
#3
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Join Date: Sep 2011
Location: Plano, TX
Posts: 1,847
You can probably find a set of small block heads easily enough.
To get big heads to work, you have to run a Performer RPM intake and port match the runners to the heads. You also have to account for the larger chamber by changing the pistons, or decking a big chunk out of the heads. You'll have other fitment problems after decking that much (if OE heads can even take that large of a cut)
To get big heads to work, you have to run a Performer RPM intake and port match the runners to the heads. You also have to account for the larger chamber by changing the pistons, or decking a big chunk out of the heads. You'll have other fitment problems after decking that much (if OE heads can even take that large of a cut)
October 5th, 2020, 09:32 AM
#4
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Join Date: Jan 2008
Posts: 904
You can probably find a set of small block heads easily enough.
To get big heads to work, you have to run a Performer RPM intake and port match the runners to the heads. You also have to account for the larger chamber by changing the pistons, or decking a big chunk out of the heads. You'll have other fitment problems after decking that much (if OE heads can even take that large of a cut)
To get big heads to work, you have to run a Performer RPM intake and port match the runners to the heads. You also have to account for the larger chamber by changing the pistons, or decking a big chunk out of the heads. You'll have other fitment problems after decking that much (if OE heads can even take that large of a cut)
October 8th, 2020, 07:26 AM
#6
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Join Date: Apr 2012
Location: Bradenton, FL
Posts: 1,468
What year 350 is it? Just keep in mind when installing earlier heads if it's a post '77, you'll need to drill (mill) the head bolt holes to 17/32 to fit the 1/2" head bolt. Installing earlier 330 or 350 heads on a later engine is always a good idea.... 455 heads is not going to be ideal since the combustino chambers are so large and the intake ports don't match unless you port an Edelbrock Performer RPM intake to match the ports.
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