I have had (what I think) are chronic issues with the rear main seal on my 500 stroker. Crank is a 440soruce 400>>500ci 4.15 stroke. I have had leaks with:

- stock retainer + regular rubber seal (2 different seals)
- 440 source billet retainer + viton seal (currently installed)

I am going to try and pull the oil pan in the coming weeks and inspect the seal to confirm. In the meantime, I feel like I should go ahead an get a new seal so I am ready if it does appear to be leaky when I pull the pan.

I see 440source has two seals (above the standard rubber) - the Viton seal and the old school rope seal: here

With my history in mind, should I do another go round with the Viton seal or try the rope seal? Before anybody asks, I did ensure the two seal halves were not lined up with the retainer/block joint and used a dab of RTV around each joint of the retainer/block.

Also, I purchased the windage tray that has the silicone seals integrated from Summit. Any experience with these? Seems like such a great alternative to the PITA gasket sandwich.

Any help is greatly appreciated! Thanks!