GT40 heads on a 68 J-code 302
As I go through the rebuild plan for my motor I have one question that I can't seem to find.
Recently a forum member suggested I switch my original heads on my 302-4V over to GT40 heads for better flow.
Since the original heads had small combustion chambers 52 to 55 cc's and a compression ration of 10:1, will moving to the GT40 heads, and a lower compression ratio, be better? Or will keeping the original heads do what I am looking to do?
My goal for this engine is to keep it close to stock looking but some mild performance and reliability gains. I want to be able to get in the car after it sits for a week in the garage and turn the key and start it up and drive away. I want a nice throaty idle that sounds strong.
In addition to the heads I plan on reusing the Carter AFB 625 CFM carb, switching to a Comp Cam roller upgrade unit (with applicable head upgrades) Better internals (pistons, rods, bearings etc) Changing to a Pertronix or other electronic distributor.
Also, if I go to the GT40 heads I may want to upgrade to shorty headers. Will they fit with PS, A/C and Power disc brakes?
Thanks for the help
1968 Coupe J-Code