I would not use starting fluid except in the direst of circumstances. You run the risk of breaking piston rings or even holing a piston if you over do it. These aren't Cummins diesels after all. Find out what's cuas9ing the problem.
1951 3800 1-ton "Earning its keep from the get-go" In the DITY Gallery 1962 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.