you can build better bore/stroke combos in a ka hybrid for way less.
Btw. i have a ka2.3 on my engine stand

went with a larger bore 88x90.7mm. Built the shortblock for less than those rods likely cost.
Judging by the sleeves there at 89.5 or 90mm, the bore spacing of the sr is very similar to that of the ka. Anyone know the exact bore spacing of the sr?