me again.....

i need some infomation about these vr motors..

i need to know when they started the s2 block with the roller rockers or what ever they did.
i have the following vh1458217 but this is a 2nd month 95 build car and i assume they started the s2 in 94 some time.

can anyone shed some light on this. i need a engine to build whist i use the last legs of the current one (just noisy berings)

thanks..