I've been trying to talk myself into doing this for a while and haven't succeeded yet. It gets very spendy very fast. There's no point in stroking that motor unless you're replacing the heads - they're just too small. The stock intake is a great design for towing torque. You would definitely want larger injectors if you go the 496 route. You'll only see about 40 more pounds of torque from the stroker kit if that's all you do. A carefully selected cam might double that. You could also accomplish the same just by installing a carefully tuned exhaust on the base 454.
Though the heads are not amazing, they aren't that bad either. Richard Holdener ran a stock head l29 to 428 hp and 507 ft lb on stock heads, 52 hp over his baseline with the stock cam. Another thing to consider if that torque production will be increased everywhere, not just at peak head flow. So i guess my point is that even if the heads limit the peak power for a stroker (with a good cam) the area under peak will still increase greatly. IMO the intake manifold is going to limit peak hp before the heads, but the low end torque with the stock manifold would be nice for the OP.
With that said, if you can afford it some heads and a better intake manifold would really top things off, but by the time you're that far in you may as well look at crate options.
https://www.gmperformancemotor.com/parts/12568778.html
One thing I've wondered is whats the best bang for the buck, stroker or good heads? My gut says stroker if torque is the goal, and heads if hp is the goal, but good heads can increase low rpm power so maybe its a wash?
Now, in my personal experience a cam + stroker made a big difference everywhere in the powerband.
OP, what is your budget? Things definitely do add up quickly in cost, but that's going to happen whether or not you do a stroker.