Hi learner and welcome,
Changing a roof is no small job, it is the backbone of the car and when u cut it off all pillars will sag inwards and need supporting, then u have the lead joins and the poisonous dust u grind to deal with.

without seeing it i think it would be easier to panel-beat the areas in need of work. especially if u r putting a vinyl roof back on.

I worked at Australian Motors Mitsubishi panel shop when the first magnas were new and there were heaps of faults from the factory on the first cars and a common one was the roof, but it was easier to fix the roofs on the car than to replace.

another tip is i had a vinyl roof on a 76 fairlane marquis with cream vinyl roof. I used armor all which looked ok but needed doing often, then learned of using floor wax instead, it looks just beautiful and stays that way for at least a year.

Hi 1000Coupe

Thank you for taking the time and effort to reply and advise me on my restoration. You will be pleased to know I have decided to go with the vinyl on the roof and boot lid as it was when I originally purchased the "little darling". I appreciate the tip of the floor wax. I make a great polish( for my bowls) from bees wax and gum turpentine which I imagine would be similar and do a good job as it is really only a water proofing polish. I will use the floor polish to start and maybe later.... the bees wax polish.
Cheers Learner / Michael

Hi ddgonzal
Thank you.
Cheers
Learner who is learning.