mmmm tough one, the series 1 does look really really well (apart from the front) i know its there for coolling but i couldnt live with that looks a bit of a mess to be honest (just my opinion) but fair play to the chap that built it. now the escos is worth more anyday of the week and the chassis of the escos can take the power can the series 1 ?? would it pull it apart ill leave that for someone who knows as im not a series 1 expert. if you did want the car id say money with it only no straight swap. if it was me id keep the escos and continue to live the cosworth dream mate