Anyone got a match ???

Hi again (groan I hear you say)… Starting problem sorted. Thank you it was down to linkage adjustment. I must have tweaked something when, I was bolting it back together.
Electrical issues are still there though. The ammeter is still going berserk when revved, the fuel gauge still doesn’t register.
I have checked the earth to sender all good, tried and extra earth still no good. I had checked the sender prior to refitting it by moving the float and checking its operation against the gauge and I checked the resistance and it was within the parameters of operation. The temp gauge DOES work. I replaced the burnt wire and fuse link with new cable and a maxi fuse holder and went for a 50amp fuse with no issues. Now I replaced the interior light bulb and noted that it started to literally smoke! Car switched off and fire checked completed..
Has anyone got any advice of is it time for an auto electrician ( if you can find one in the UK these days ) to take over and consider a rewire ?