You could get away with it and then again customs could ask you to pay £100.00 approx
Whatt you should have done is look at this web site in the Uk they are cheaper than the US at the moment on both the Savage SS and the Savage 25 RTR
I have ordered loads of parts from the USA - Hong Kong ect.. - New 3PK Futaba radio - Novarossi engine - Digital servos .. ect.... I have only had to pay customs once
By the way the Savage RTR is on this web site in the Uk for £334.00
Savage 25 RTR 2005 version (updated steering and diffs) - nitro 4wd monster truck, new lower price! £334.95
http://www.dms-racing.com/