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01-02-2024, 11:50 PM | #1 |
Senior Member
Join Date: Mar 2013
Location: Ann Arbor, MI
Posts: 1,022
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Re: '75 sbc
Interested in your build specs for your 400. I have a stock bore '79 400 I pulled from a running k5 years ago I'd really like to build so interested in how you built yours.
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01-03-2024, 09:44 AM | #2 |
Active Member
Join Date: Jun 2019
Location: Gaithersburg, MD
Posts: 104
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Re: '75 sbc
The 400 came with the car as .030 with Dart Pro 1 200 cc heads, 6" rods, a Comp Cams XR276HR-10, and the Victor Jr. The wrong fuel pump pushrod was installed (no bronze tip) and it ate the lobe.
When I had it rebuilt, I reused as much as I could to save money. Otherwise, I'd have at least switched to a dual plane intake. It went to .040 with the same heads, intake, etc. The Jones cam is mild and produces about 15" vacuum at idle. It's good enough for me in front of a Richmond 5 speed with a 3.26 first gear and 2.73 posi. I can cruise all day at 75 mph. 272/276 @.006" 224/228 @.050" .340"/.340" Lobe Lift .510"/.510" Valve Lift w/1.5 rockers 112 LSA |
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