Team-
I need some help. My 73 Series 3 88" is a beast- go anywhere anytime. Lately IT has had a hard time starting after warming up.
I'll drive 20-30 minutes no problem. Park the Rover and turn off- I'll test it and try it immediatley and it fires up.
However, go into Home Depot for 30 minutes and then it's super hard to fire up again. Starting fluid does NOT help when this happens.
It cranks and cranks- then stops. It has never left me stranded, but it will take up to 30 minutes to start again.

Here's the baseline of what I've done to try and cure this:
New Spark Plugs
New Plug Wires
New ProLine Distributor
New ProLine Coil
Brand new Weber Carb
New fuel Filter
New battery
Check/Clean connection from Ground to Starter
Adjusted Valves

Rover has 61k original miles, I believe its a converted non-lead gas head. Runs well when started, hits 70mph on a sloping downhill with a tail wind.

Here's what I get: It'll crank like this for 20 times in a row if you let it.....