So as a bit of a follow on from my last post, we'll try keep this simple. Not chasing every single HP possible and with the exception of distributor that needs replacing anyway, and a reground cam and associated bits, and exhaust etc will be replaced, want to try and make use of as much as possible from whats already in the parts bin without buying any more engine parts, where possible. The basic idea being to put a cleaned up and appropriately skimmed 12g202 head onto something and make a little bit better 998 while its already out of the car. So basically wanting opinions on what parts you would use if you had only my parts stack available, to make a 998, and why.
In the stack of spare parts available;
A complete running 74ish 998
A 76 1098 basically long block and gearbox (obviously this is the source of the head and an HS4)
An A+ 998 short block only (crank+pistons but not much else)
An 850 long block possible source of spare nuts bolts pulleys etc and not much else.
I guess the most obvious question is to avoid disturbing too much and just use the 998 thats already running as a base, or start from scratch and use the A+ block and adapt everything else to fit (bar the dizzy but since I need a new one anyway not really an issue with that bit)