340 heads on 360?

If I was building a 360 and I had OE heads, the worth of a 2.02 would be dependent on two factors, money, purpose of the build.

The 2.02 would pay off fine from a certain perspective, even in mild builds. I do t see or have felt the worth. The 2.88 will perform well for mild street machines. When and where the pay off of a 2.92 is May not always be a fact of the Dyno because as I said earlier the bottom two lines are cost and purpose of the build.

If your seriously looking for hp from the OE heads, then you would be seriously looking at not just 2.02 valves but also well designed valves in well thought out seat and carved out ports.

Years back I did a stupidly mild 318 build up with just bolts one to a basically dead on its heels smog 318 and managed high 14’s on stock tires. 318 will run showed some basic build tips and porting. Stock small valves can and will do OK.

Scientifically, you can weigh things out. Your wallet may stop you from certain upgrading routes so be creative with other parts your going to purchase anyway.