Hello david, welcome!
I'm going to suggest an expansive solution... If you really want some good engine detail and if you want the best 1:24 around try the trumpeter kit.
It is on sale at hlj.com check it out:
http://www.hlj.com/scripts/hljpage.cgi?TRP02401
It's pricey, without the "sale" and still pricy when calculating the shippment cost.
You get clear engine panel, all moveable surfaces are movable, three resin figures, rubber tyres, etc...
If you can afford it enjoy it! if not stick to good o'll airfix