right then chaps need some advise?

1 do i go and build a group 4 escort mk1 rally car my self
me and my mate have all the tools to do it?

or do we buy aother one ready build and done

we have a car here that is compleat and running but needs some work to wings etc as are rusty have parts that are with the car when bought

anyone have prices inmind and who much it will be worth when done ?
any help pls best regards ian