Does any body know the full differences between these two blocks?

We have a 205 engined rally car at college but it is 4 wheel drive.

I thought the 205 was designed for 2 wheel drive and the 200 had extra webbing to accomodate a front diff.

Can any body please confirm this? Also how long would a 205 block last with a 4 wheel drive system? Please bear in mind the car is Group A spec and will be a tarmac rally car.

Thanks in advance.

 

its been covered many times on here mate; do a search

 

well the 4x4 block was stronger because of flex from the extra grip,not advisable to use a 205 block in a rally car i wouldnt think,are you sure it isnt the rs500 variety 205 block as they are supposed strongest of all.