What dipstick(s) will fit a 86 Camaro engine?

[ProlepsisMaximus]

A good friend of mine recently purchased a 71 Impala that had been fitted with an engine from an 86 Camaro. The dipstick (among many other things) is broken, and we have been unable to acquire a new one locally.

I've been looking on eBay and found lots of dipsticks, but since I know very little about domestics (particularly older ones), I'm not sure which one will fit.

If anyone could tell me what to look for (BB or SB, other years/models with identical dipsticks, etc.) it would be greatly appreciated. In case it makes a difference, the dipstick is on the right side of the engine (someone told my friend that it was significant).

Thanks in advance for any help or advice!