[68gmsee]

Here's the symptoms I had on my 96 Tahoe in case someone else has problems with this or similar year motors.

In my case, leaking head gasket did not cause a miss but there was coolant loss and smell of coolant.

The spider assembly symptom I had was backfiring when starting after sitting for a period of time. Similar to a flooded engine. Once it was running there was no missing or backfiring.

It's wise to replace spider asm. and fuel regulator while the top is off. I wound up having to do the spider asm/reg a few months afterwards anyway. Regulator was the culprit but injectors were so bad they were brittle. After close to 300K I guess it's expected.