Stock t-body takes a 2.5" t-bolt clamp.
70mm t-body takes a 3" t-bolt clamp.
TA-60 turbo takes a 2" t-bolt clamp at the turbo and a 3" t-bolt clamp at the intercooler pipe.
IC pipe to IC is two 3" t-bolt clamps.
IC pipe from IC to t-body takes three 3" t-bolt clamps and whatever size t-bolt clamp to match your throttle body.
Here are the part numbers that PTE uses.
2" T-bolt clamp = Five Star 235-69
2.5" T-bolt clamp = Five Star 200-76P
3" T-bolt clamp = Five Star 250-82
You will need a 2" to 3" reducer hose to go from your TA-60 to the IC pipe.
You will need a 2.5" to 3" reducer hose to go from a stock t-body to IC pipe.
Or, you will need a Straight 3" hose to go from a 70mm t-body to the IC pipe.
And just for reference sake,
3.5" T-bolt clamp = Five Star 250-83
3 3/4" T-bolt clamp = Five Star 250-94
4" T-bolt clamp = Five Star 250-100
Hope this helps.
Patrick