Pity I didn't take piccy's right at the start . . .
I brought the old motor ('72 MoPar 318ci) off of a guy Coventry way. The motor was shot so I stripped it and cut out as much of the internals as possible with a hack saw and 9" angle grinder to reduce the weight.
4 hours a night, 5 nights in a row, black snot for 2 weeks.
Then the cleaning . . . then the surface prep . . . paint.
Then sourcing all the shiny bits plus other bits like a coils, dizzy cap, leads, plugs , filter, hoses . . . . etc . . . etc . . .