MadaboutKitcars

...the cover of this book look like the factory racing sportster?

http://cgi.ebay.co.uk/How-to-Power-Tune-Rover-V8-Engines-fo-Hammill-Des-Ne_W0QQitemZ280386936930QQcmdZViewItemQQptZUK_Books_NonFictionBooks_NonFictionBooks_SM?hash=item41485d2062&_trksid=p3286.c0.m14

Those side panels certainly look the right colour.

Yup, sure is.
You can just see the edge of the nose cone as well.
(In case you've forgotten, there are pictures of that engine and car on your website) It had Marlin Purple sides at that time.

Just for fun, here's another shot....



...just look at that front roll bar!!
This, I believe, is Steve Hole who runs Totalkitcar.com

We could have a competition to spot a Marlin in the most unusual publication...(and don't all say the MOC calendar!)

yeah that's pretty much where I recognised it from