My memory of it, (which is nearly 40 years out of date so it could be my fading memory, or changes in-between times leading me astray), is that you got 1 hex per turn from impulse drives, and then you could add to that with your warp drives - and shooting could take place while using warp. However, this isn't so important as there is no warp in Traveller, and takes the discussion well away from Traveller, and into the realm of an old man reminiscing about how things used to be when people played real games before these damn youngsters messed everything up.
If you want something that has a lot of elements from SFB, such as the importance of facing - Attack Vector from Adastra
https://www.adastragames.com/products looks promising. They've even adapted it to Traveller. Vector and 3D movement are their trademarks. I haven't bought the game though, and would very much like to hear from anyone who has about their experiences applying it to Traveller. Two issues seems to come up 1) from what I can see there is a steep learning curve, during which a LOT of time is probably spent figuring things out. and 2) adapting the ship designs to the combat system is important, and so it would either need a long line of products to make it useful to campaign referees who will have lots of different ship types in their games most of which aren't represented.