I have a 73 350 engine and a set of 67 330 heads. Has anbody done this swap before and how did it preform. I'm not worried about having to use high octane fuel.

 

I've not done it myself but have heard of people putting the earlier heads on to increase the compression ratio. I just checked the wiki site and if I'm reading it right there's a table that tells you what the compression ratio will do moving from your stock heads to ones with different sized combustion chambers. You can access that through this site, but here's the link to save you some time. John

http://www.oldsmobilewiki.com/index....2C_Interchange

 

thank you for the link