New Tranny

I posted this over at Corral too but I think this section gets more traffic.

I am in need of a new transmission, I have the stock T5 and some unknown clutch in right now and I don't think it will last long with my new combo.

I have the car in my sig and am going to bump it up to 12-13psi + methanol injection and then later down the road a Systemax or Edelbrock intake.

Yes I know the heads are killing me but I do not have the funds to replace them right now.

I should be putting down a minimum of 400ftlb of tq to the wheels and I am afraid my current T5 is going to explode while I am on the dyno.

A T5 tranny from Astro with their gearset will run me about $2,000 and I definately cannot afford that right now. They sell their rebuilt T5's for around $600 which is affordable for me, but they say they are rated for 330ftlb of torque.

What do you guys think about either keeping my stock tranny and putting in a king cobra clutch?

What do you think about buying one of these $600 Astro's?

Also, is there any other type of T5 that I could put in for cheaper that can support my needs?

Thank you

Would the 3550 be able to handle 400ftlb fine?

How hard is it to rebuild a tranny with the Astro gears?

EDIT: I do not know what kind of clutch I have in there, but I think I am going to put a good king cobra one in it.

If I kept the stock tranny I would definately not track it, do you think it would be able to handle quite a few 2-3-4 gear pulls down the highway that I like to do while getting on?

I figure if my tires are slipping then there wont be a lot of stress on the tranny.

Thank you for your help.

I don't plan on powershifting my tranny as I have heard of stock mustangs blowing them up when powershifted.

I just ordered the king cobra clutch and will be installing it once I get my engine/tranny out.

Thanks again.