Thoughts and opinions for my 727

I was looking around for trans parts for my build and came across the Cope 600hp build it yourself kit. It comes with a choice of valve body, billet drum and a bunch of other things.
I'm sorry I can't load up the link because I fabo on my phone.
Anyways the kit should support up to 700 hp.
It's a little over $2200 in price but it seems if I build it like that I won't break it easily.
What do you guys think.
I really don't have any definite numbers on my car yet, power or weight. I've done some calculators with conservative estimates my 470 should be around 640 hp with sft cam and I'm trying to get the car to weigh no more than 3200 with me in the seat.
Thanks guys

@younggun2.0 did a really nice build thread on his 727 for his 470. I don't remember if he listed all the parts and prices he used. I think he did where he sourced them.