Chevy's big block series started with the Mark I (W-Series ... but it re-introduced round intake ports such as the ones featured in the legendary Ram Air IV, which allowed for maximum airflow ...

The LS6 Was Only Offered In Two Chevy Models Despite Chevrolet having the most potent big-block engine on its hands ... cast iron port heads had a 2.19-inch intake opening and a 1.88-inch exhaust ...

The 7.4-liter Chevy big-block was just one cubic inch below but ... The mechanic left the original aluminum intake manifold but strapped a new 850-CFM double-pumper carburetor on top of it ...

Jonathan Herrick’s survivor L89 Corvette is as original as the day it was made. It even wears its original paint.