my 451 combo

Don't you worry about a thing trust me, Those 451 lowdecks are strong runners, very strong, I kicked *** on many for 2 yrs. with mine.

As for the cam, no its not to large, I ran the XE284H & it was mild. I ran high 10s in my duster with 906 heads, you'll love it :glasses7:
That is the cam in my 451 as we speak lol! Never ran 10s but did dip in the 11s a couple times through the muffs and in full street trim at 2300ft.