Howdy Tom:
I'm not familiar with the linkage configuration on your Bronc. '69 cars with sixes had a mechanical linkage. You mentioned that you were intent on keeping your hood stock. How willing are you to make modifications under the hood.
You didn't say what year the 170 carb is from. If it's the stock one that came on your '69 with a 170 engine it can work- but you will be giving up a significant amount of power. The 1100 Autolite 1100 from a '69 200 is also down on power compared to the '67 and earlier 200, 1100 due to FoMoCo downsizing them trying to meet EPA requirements. The '69 Autolite 1101 from 250 engines that Bill mentioned, would be a gem. It will be compatible with your distributor vacuum advance system and, I think, would be compatible with your stock linkage.
IF necessary, modifying your stock linkage to be able to use a 200 or 250 carb will be worthwhile.
What linkage does your '69 Bronc have?
Adios, David