MinnMan

Please note:

(A) I am not saying I want to do this - I'm just curious.
(B) I am not asking for advice about how to do this - I can figure that part out (intervals, weight lifting, etc.) if I want to.

I'm a reasonably well trained endurance cyclist, but I do not have, nor have i ever had, much of a sprint. No short term power.
I'll give numbers below, but my question is, hypothetically, if I dedicated myself to improving my 3 and 5 second power, how much difference could.I make?

I have good endurance power. I can pull for a strong group quite ably and I can do a solo 5 hour century. I'm good on the hills.
But my sprint sucks. I'm 61 years old, but I don't think it's only age - In the 12 years that I've been riding seriously, it's never been that good at short term power.

I'm 66-68 kilios. My FTP is in the range of 240-250 watts. My best top end power (instantaneous) is around 750 watts, and at 3 and 5 seconds, is more like 650 and 600 watts, give or take.

I ride about 7000-10000 miles/year.

I'm not saying that I intend to dedicate the time necessary to make a difference. i don't lift weights (though I know I should), and I'm not really contemplating beginning a serious program of weight training or interval training. So, strictly hypothetically, If I resolved to improve my sprint and put in the time and suffering it required - how much difference could I make? 3 seconds at 800 watts?

thanks