they aint that bad there a cheap throw away engine i would never bother fitting one to a oldskool old cars should have a old engine or atleast a old looking engine but for a fwd there easy to shoehorn in if your ok with elecs your away. scholar built a 1.4 zetec (sigma engine) for a chap in a rally car an it produces 165 horse not bad for a so called shit engine i had a kit car with a stock 2.0 black top zetec std cams std bottom end all it had was a 4 branch an 45's it was rolling roaded at 174 horse didnt think that was bad at all