The 3/8 likes gas is is not good for mileage .
The 425 is much better.
But i swap the 425 out for a Schneider 270F on my 304ci .
More Street friendly .
The 425 kicks in way too late.
I wanted a H&C 6732 from Pete , but since we dont have cheques anymore in Germany for payment
And his post office is not able to ship to forgein countries ,Schneider is my second best choice.
I used the 270F before with great results, but always like to try something new.
So if anybody on here is able to help me to get a h&c cam from Pete , i would be very happy.
I will post the results .
Regards
Michael
PS .... all my info is from what i tried , not reading the internet.
Best all around cam for big engines .... isky 404-A
Did 104mph in pendine
102mph for schneider 270F

I am not a racer , just like flathead engines.