That would be a 357ci . If it a Flat Top Piston Build 9.25.1 C/R with them 882 Heads . This is your Camshaft http://cranecams.com/index.php?show=...32&lvl=2&prt=5 It is on the Small side . You Could have went Bigger on the Cam with that 3.73 in the Back . Sure them Double Hump Heads would Help . they would Rase your C/R and they Flow better then the #882 un-Ported Smog Heads . If you do Change the Heads Swap the Camshaft too . Go with the Comp Cams XE268H hyd Flat Tappet Camshaft . Your Intake and Carb are Good . That HEI needs a Curve kit asap it would even help with your build as is . There are other ways to turn this Engine Up . But with the Parts you already Have This will be the Best way . I do think with the D/H Heads you will need to run 91 Octane Fuel .