Questions on these heads.

Is this a good head for a primarily street 454 .030 over motor. 10:1 approx 240 duration, high 5-600 lift, 110 LSA solid cam. 66 Chevelle Th400 3.73 rear, 3800 lb car w driver,

On a 66 chevelle what are the chances of header fittment issues?

I just cant bring myself to re work my 781 heads to the approximate tune of $1000, so Im lloking to purchase aftermarket.