Dale's Cuda Shop wire hose clamps not the correct size? - 1967 Dart 273

Anyone have a problem using wire clamps?

I bought kit DC004 66-69 273-318-340 Hose Clamp kit 6-7 months ago, just put them on with a hose change. The kit came with 2 radiator hose clamps, 1 t-stat hose clamp, one water pump inlet hose clamp, 2 bypass hose clamps, and 4 heater hose clamps.

Two of the rad / water pump / t-stat housing clamps were the same size. The other two rad / water pump / t-stat housing clamps were a different size (slightly larger, like 3/4 to 1 wire thickness larger in diameter)

Both by-pass hose clamps had an ID the same as the OD of the Gates bypass hose that is available ( ~1.1")

The 4 heater hose clamps fit well on the 5/8 heater hose.

The T-stat housing is 1 year old and has no pitting, all other iron fittings / inlets have some pitting from age.

What works well...
1. The heater hoses, no leaks all 4 ends

2. The lower rad hose (I used the 2 smaller of the 4 hose clamps on both ends) no leaks either end

3. upper rad hose, radiator end, no leak (I used the 2 larger of the 4 hose clamps on both ends. Easiest to change in the future)

What doesn't work well...

1. The two larger hose clamps do not have as much clamping force as the two smaller ones. this is resulting in the t-stat cover leaking at the hose.

2. The by-pass clamps measure the same ID ~1.1" as the OD of the Gates hose at ~1.1" they will not work at all

I'm sure Dale's is a reputable business but they were not helpful at all with this issue, they only said that they sell the kit all the time and mine is the first issue they have had and that the water pump was the problem (it's not leaking there) and they never addressed the by-pass hose clamp size.

I ordered another wire clamp kit from another supplier and am eager to see the sizes that kit comes with.

The gates hoses (upper and lower rad) claim 1.5" ID all ends (no OD listed) It stands to reason that all 4 clamps should be the same ID?

The Gates bypass hose lists .8" ID (No OD listed) was the OE hose twice as thick?

20386 Lower Radiator
20602 Upper Radiator
19605 By-pass hose

Maybe I should have used the larger of the two on the radiator end of the upper and lower hoses and the smaller of the two on the WP inlet and t-stat housing?

Any and all thoughts welcome.