just make it nice and neat and you wont have a problem. Take it over myaree as welshpool are twits, an try get permits for the obvious things you have got done to it, pod filter etc. 4ag in a 70 looks so factory cops wouldnt no when they pull you over. A cop once thought mine was a 20 valve. So if u get pulled over, whip out your permits an you should be a free man minus the reason u got pulled over for, driving crazy etc.
I been down the path of gettin mine engineered, submitted a detailed with pictures of everything that i modified, and they were concerned that my steering wheel was aftermarked, suspension has been modified OMG an the like.
Just drive it, and dont hit no one. i may seem a bad influence, but our cars would be safer on the road than little nannas 200B that has never been serviced..
Drive boy an dont worry