VR6 Gearbox make firm …..

Hello……. A buddy of mine wants to convert his Corrado VR6 to Turbo. Power is aimed at 350 to 400 hp. Now it’s about the transmission. He wants to maintain the original 02A transmission. It is revised and should be reinforced at the same time as far as it goes. What is realistically feasible?? One always reads something of differential screw or immediately install a lock but one reads nothing of how much that then holds. The VR6 transmission is indeed even only an MQ250 transmission. Many will now certainly say immediately a 02M transmission pure from the R32 or something like that. He does not want to convert anything great gear technology. But can someone from own experience say anything about the topic or help. Thanks already in advance. …. MfG Scirocco 16V