OK - if pickguard swapping is not allowed - it will be either a HSS strat or a tele.
Amps - probably a Vox Top Boost preamp coupled to a dual 6L6/EL34 or 6V6 cathode biased power amp. Enough clean headroom to play almost everywhere, and the overdrive tones can be had with pedals. Or is that cheating as well?
Cheers Stephan