It can be very relevant to someone building their engine for a specific use. Most street driven hot rods that people build are not driven to the engines full potential or are over built with peak hp numbers higher in the rpm range where it is rarely driven.
since I drive on the street I want good torque down low so I can get away from traffic at a light,
I've read a fair amount of dyno tests on heads and intake comparisons and when using the same ci engine the difference in heads mostly comes down to just a few hp/torque numbers at different rpm ranges, same with intakes.
There are so many factors that need to be addressed when building an engine for a car driven in a particular venue (drag, autocross, top speed ect) but in a street car not so much. Yes you do need to plan the build so it works well with the rest of the car but to agonize over whether this particular head is better for a given cubic inch not so much. If he already has the heads then build the engine to fit the head, I think he would find a 306 with those heads and a cam that is matched to them it will be really fun to drive as long as the other factors are considered.
I am not a drag racer, I drive my crap in the real world where I know what I want it to do and it does it pretty good.
since I drive on the street I want good torque down low so I can get away from traffic at a light,
I've read a fair amount of dyno tests on heads and intake comparisons and when using the same ci engine the difference in heads mostly comes down to just a few hp/torque numbers at different rpm ranges, same with intakes.
There are so many factors that need to be addressed when building an engine for a car driven in a particular venue (drag, autocross, top speed ect) but in a street car not so much. Yes you do need to plan the build so it works well with the rest of the car but to agonize over whether this particular head is better for a given cubic inch not so much. If he already has the heads then build the engine to fit the head, I think he would find a 306 with those heads and a cam that is matched to them it will be really fun to drive as long as the other factors are considered.
I am not a drag racer, I drive my crap in the real world where I know what I want it to do and it does it pretty good.