Converting to 2.0 Heat Exchangers from 1.7 Heat Exchangers, The definitive parts list Options

[FlatSix]

I have a 1.7 engine. I'm planning on changing my heat exchangers to 2.0 stainless heat exchangers. I've had a stab at creating a list of the parts that I need to source to do this below. Have I missed anything?

2x 2.0 Heat Exchangers (I have)
1x 2.0 Exhaust (I have)
1x 2.0 Exhaust Hanger Bracket (I have)
4x Gaskets H/E to Cylinder Head - I see part nos. are different for 1.7 and 2.0, which do I need?
8x Nuts H/E to Cylinder Head - what size?
2x Gaskets H/E to Exhaust
6x Nuts and Bolts H/E to Exhaust - what size?

Does the existing warm air elbows etc. carry over to the new installation or am I in for more expense?

How much of a PITA is it to remove old rusty H/E's? some of the nuts look to be well hidden. Do I need a special tool or will a regular socket set do?

Thanks in advance.

[rhodyguy]

both pieces of the of the branch ducting will carry over as will the j-tubes. those items are l&r specific. you will need to obtain a GOOD penetrant, Pbblaster/Aerokroil or the like. be generous with the product you find. spray as high into the ex port recesses as you can. do NOT use a product like WD-40 (lubricant). more than likely numerous applications will be required. time is your friend so be patient. clean the rust off the exposed stud ends with a tiny wire brush/wheel. dependent on the exh nuts it will require a 12 or 13mm thin wall socket and long extension. 1/4" drive ones seem to fit the best. again, time is your friend. try using a torque wrench set to 18lbs to loosen the nuts. this will help to prevent twisting and breaking the studs. when the studs start to break, you'll be f-ed. properly….