Never used Master Cylinder for 5 lug conversions. It is from the earlier Ford Motorsport catalogs. Here is some detailed information on it from mjbobbits site:
'84-86 SVO - (SAE Threads) 1 1/8" bore, old style aluminum reservoir unit. no low fluid sensor. This is the same as the 84-90 Lincoln Mark 7. The difference is usually the SVO is aluminum, and the Lincoln can be a cast iron unit. The aluminum is what you want to keep the weight down. This works BEST with the larger caddy or Lincoln rear calipers and the front SVO 73mm calipers, and is the only setup I recommend with the SVO unit!
$30.00 shipped
'84-86 SVO - (SAE Threads) 1 1/8" bore, old style aluminum reservoir unit. no low fluid sensor. This is the same as the 84-90 Lincoln Mark 7. The difference is usually the SVO is aluminum, and the Lincoln can be a cast iron unit. The aluminum is what you want to keep the weight down. This works BEST with the larger caddy or Lincoln rear calipers and the front SVO 73mm calipers, and is the only setup I recommend with the SVO unit!
$30.00 shipped