2 piece Rear Main Seal

[needboost]

I getting ready to open up the motor from my Mustang to investigate what we believe to be a bad lifter at the same time I'd like to fix the leaking rear main seal. The block is a mid 70's Mexican block so it has a two piece rear main seal and I was just wandering what brand any of the people on here with experience with these older blocks would recommend. The current seal is a Fel-Pro #BS30136.

[needboost]

If the crank makes any difference it has a RPM International forged crank Part # DG3302 with 2.249" Main J.

[ZR]

stagger where the seals meet in relation to where the oil pan meets the block.

[ZR]

http://www.summitracing.com/int/parts/fel-2901/overview/make/ford

[ZR]

They also offer this, sold as marine / severe duty.

http://www.summitracing.com/int/parts/fel-17746/overview/make/ford

[needboost]

http://www.summitracing.com/int/parts/fel-2901/overview/make/ford

That's the one I had planned on getting so far...