ok gt 40 heads dont need that much work. the bowls look pretty good just clean up on that and the intake ports. the real work is in the exhaust ports. thats probably why he charges 200.00 probably 6 hrs give or take. a lot of the small block heads were pretty decent in the bowl or under the valves if you get a set of older heads you could be there for days. I did a set of 351 windsor heads for a buddy recently and only took 4 to 5 hrs. I only do heads for myself and friends because its a lot of work. I did a set of 69 windsor heads on my 88 with a 302 it went 11.50 @ 117 all motor so I assume the work was good.