[dirty hands]

try spark plugs first ... then coil ... start the car at night in the dark and see if the leads sparkle if they do replace them
then vaccume lines to the pots on the carby need to be checked
you do that by geting a length of vaccume hose attaching that to the poys on the carby / sucking in the end of the vaccume pots hold the pressure with the tip of your tounge and if it doesnt hold the vaccume operated pots need replacing

the telstars had problems with vapor lock when hot (mostly on stop start running from shop to shop for example )
I had to carry water and a rag--- soak the rag in water put it around the carby then wait till the fuel was cool eneough to pump up and start the car
I did buy a longer length of fuel line and foam type insulation over the hose that helped sometimes