In a nutshell, the Boss 429 used Hemi or Semi-Hemi design cylinder heads, depending on your perspective, attached to a modified 429 CI “385” series block. It was rated at 375 gross HP which was probably a substantial underrepresentation. These were significant engines and not the sort of ...
If there was an equivalent of a Victoria's Secret catalog for engine parts, the Boss 429 would seize its rightful place on the cover. Blown flatheads needn't apply. With its gloriously wide cylinder heads and beautifully scalloped valve covers, its visceral appeal and visual pres-ence lingers...