New to me K10 Burban, needs love

[patobusta]

Hi there, long time looker here, not sure if I have posted before.
I have a 67 C10, 90 K5, and a 67 K10 burban that JUST 10 mins ago arrived home (while we are not there, so it will be kind of a mess when the wifey sees this land yacht parked on the driveway)

It looks good from 10feet, but needs A LOT of TLC, as the guy that had it did a very low cost "resto".

Its an original K10, now with a 5.7 vortec with a SM465+np205.

I'll have to solve some steering issues, replacing the fuel tank/pump that has an external that makes more noise than the engine, some ring and pinion issues (mismatched front and rear so no front driveshaft) fenders, tailgate... and just starting to look at it.

Im having a hard time figuring parts for it, LMC and others does seem to show compatibility with other K10 parts on suspension and steering, but not all of them, and for instance the rear tailgate it seems to be not available as new repro parts...

I dont like the wheel and tire combo, its a 275/65/17 sort of highway tire and to me it seems small, would like a taller wheel, 33 or maybe even 35. But couldnt find a lift kit that will positively confirm fitment.

Will really apreciatte help & guidance from the more experienced guys here.

Thanks!