67 Bonneville 400

[ejw71]

Will 73, 455, 4X heads bolt up to a 67 Bonneville 400 block? These heads would produce about 8:1 cr, I think. How about 75, 400, 6X heads? Thanks, Ed

[ejw71]

Will 73, 455, 4X heads bolt up to a 67 Bonneville 400 block? These heads would produce about 8:1 cr, I think. How about 75, 400, 6X heads? Thanks, Ed

[engineer]

use the compression calculator at the classicpontiac site for these questions. You can look up any details you need there for the input values for the calculations.

[ejw71]

Unable to find a compression calculator at classicpontiac.com. Majority of threads is car dealers all offering the lowest priced Pontiacs.

[bonnevista]

That web site is www.classicalpontiac.com (http://www.classicalpontiac.com) - not classicpontiac