idle not staying still and backfiring (4k)

[scope]

You havent fixed this yet? Gasket is like $10 from Repco, and it'll take all of half an hour to do

aha so i did it today. it fixed the idle problem but still backfires when slowing down ?

[Dell'Orto]

Bit of fuel going out the exhaust, nothing major

[gothegravel]

Not sure how your 4k is modified but with a 4k you can run a 3kb head with a 3kb inlet manifold and twin carbies. It works bloody well especially if you match port the inlets.

[vhpacer]

Is the engine stock standard just with the exhaust?

Try turning the mixture screw anti-clockwise half a turn.

Have you tried this?

[scope]

Is the engine stock standard just with the exhaust?

Try turning the mixture screw anti-clockwise half a turn.

Have you tried this?

yep