I tried 3 setups. First was a Mancini "outside the headers" design. It worked great on the engine stand but wants to take up the same space as the power steering in the car. Next was the flexible dipstick. It seemed to wipe the oil off when pulled around turns and I couldn't read it.

Finally I ordered a stock chrome re-pop stick. it fits between the header flange and tube. The stabilizing tab bolts to the engine mounting bracket bolt. It works fine. Its just a PITA to pull it if the headers need pulled. The engine mount bolt is not easy to get at. And I did need to sand down the end to get it to fit the block.