Geometry is everything with a car like a 7, get it wrong and you have a pig.

so are the mx5 uprights etc better than the sierras? i.e not having to use mushrooms etc. is the geometry any better?

also is there any weight differance between pinto setup and the mx5 setup?

lastly, i really dont want a bonnet scoop/bulge, will the mx5 motor fit under standard bodywork?

cheers again, sorry to pester :p

The mx5 does not use the mushroom adapters

Dont know about the weight difference

The bonnet will need a bulge to clear the plenum on the mx5 engine

With a change of airfilter/ airbox the MX5 motor will sit under the Roadster bonnet. It also gets away without needing to modify the sump and oil pickup.