My thoughts on those heads is I probably wouldn’t get the 245 maxed out heads and I have two leakers on my shelf that I bought from my buddy. I have posts saved on my computer of lots of issues. My 360-1 heads are had ported and far from maxed out and have gone the same exact 5.98 as my Edelbrock heads and they aren’t maxed out. Their exhaust program doesn’t have to be as aggressive as it is especially if you go for fast airspeed like I do. They take too much material out.