If that pipe is really from 1770 you should sell it to a museum and buy a weed pipe for your weed. Tobacco pipes aren't designed for weed smoking. The heat requirements are different. They're designed to be lit with a match and have constant heat from the tobacco, which over time causes a burnt carbon "cake" to build up, which protects the interior from heat damage. The preferred way to light pipe tobacco is with wooden matches, not lighters because of the damage they'll cause to the rim of the bowl with scorch marks, etc.
Furthermore, if the pipe is that old it probably wouldn't be good for smoking anyway. Briar pipes from the 1800s-around 1945 are the best for smoking tobacco. Briar is a dense, slow-growing, heat resistant wood. It takes 100 years or so to mature, then many years to season before being ready to use to make pipes. The industry now of course speeds it up because all the old growth briar was used up around WWII.
For tobacco:
For weed:
