Yes Dan,
There are quite a few external differences. Mainly the lack of plugs on the end of the heads, contour of the tops of the exhaust ports and snowflake size. Once you know the exhaust port angle and snowflake difference they are very easy to distinguish mounted on an engine. I can snap a few side by side pics and post them for you if you like. I have the plugs if you want to add them to 074 heads to get a closer look.
Jason
Last edited by SuperNovaSS; 10-03-2018 at 04:12 AM.
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