Mondial 3.2 A/C Refurbishment

When I purchased my 1988 Mondial about 3 years ago, the a/c was not functioning. I went to a shop to do a 134 conversion, and determined I had a failure in the receiver dryer dessicant. The shop flushed and flushed, new dryer and got things cleaned up. Then pressure tested and blew out the condensor. Was repairable. On start up, the compressor did make some initial unpleasant noise, but then seemed to settle and the system worked. But I knew I was on borrowed time with the compressor.

I managed to track down a Sanden SD508, got a new one from a helpful supplier in the States for about $350. Bought a new clutch and condensor as well, and a new dryer.

So, before I start to swap out the compressor, etc., is there anything I should think through. I am a persistant do it yourselfer, except for the eventual recharge of the 134 and related leak test. I have done as much research as possible, but need some car specific clarity.

For example, do I put all the parts on, and still have the system flushed before recharging? Will this just clog up the new dryer if there is some debris in the system? Should not any debris be caught by the old dryer and the compressor itself? I really do not want to replace hoses, they are all in good shape, and the evaporator/expansion valve I was not going to touch. But some say replace everything? The expansion valve is just an orrifice, and since the system works it isn't blocked?

Should I install an aftermarket filter to get extra debris protection? Will the new dryer be sufficient?

Will the old compressor come out without bolt access problems or other surprises? Looks pretty accessible in there, but a bit tough to get at some of the bolts.

I am just hoping for the wisdom of the more experienced f chatters who can give me the heads up on what to expect. Part of the fun of the hobby is just
tackling these things, always something to learn!