Spit 1500 Competition handbook

["Terry & Cindy O'Beirne" <esp@hypermax.net.au>]

The old B/L Spitfire 1500 competition handbook makes mention of 
Companies called Mueller Fabricators (Lynwood CA) and SAE Autumotive 
(Akron OH) in regards to uprated rear axles. Can anyone advise what 
these axles were and also if the companies still exists.

thanks,

Terry O'Beirne
GT6 racer under restoration