The fonts used for the crawls are News Gothic Bold (for episode number and body) and News Gothic Bold Extra Condensed (for the episode title). I’m not certain of the exact details, but 40pt for the episode number, 54pt for the episode title (vertically stretched to 170%), and 32pt for the body text seems to be a good match to the original ESB crawl. Matching the line spacing by eye gives me 106pt leading between number and title, 87pt leading between title and text, 45pt leading within the paragraphs and an extra 44pt between paragraphs, but I’m even less confident of that.
That’s matching to the original theatrical crawl; I’m not sure if Ady’s made any special modifications himself.