I thought the hole was there for fuel lines but it never got used. I guess it was used as a vent for the tank but ended up rusting the tank out and the rear seat.
I would think a watertight vent would be a good idea.
Pb
I did many years ago, it seemed fine. Unfortunately the completed dash is still sitting under my bed waiting installation but the pad went on quite well. Certainly less flexible than the new ones.
Pb
Loosen the 6 bolts where the hinge attaches to the door and slide it back. Hopefully there is enough movement left in the captive nuts to get the door where you need it.
Pb
Click on the persons name to open up there profile and then look for the envelope symbol. Press that and you can send a PM.
PS a very interesting topic, I get the feeling Anthony may have some interesting information.
Peter
LS motors have been installed. I'm going to attempt one soonish.
You will need motor mounts to place the engine in the right location . I believe people have used hooker headers (rear dump) to clear the steering box and you need a rear hump sump which Holley and others do.
I have heard that the gearbox fit can be an issue for some but not others so I'm not sure what to do there yet but I'm going to try a 4L60e.
If you have Facebook (Avanti swap page) there is a fellow selling his Ls swapped Avanti. Its rough looking but he might have some answers.
Pb
I thought it was around 12mm. I will check when I get home but it won’t be for a couple of weeks.
pb
ps I’m trying to get some made up for my seats as well.
pps do you have the chrome pieces the hidem slots into ? That would be the width you need.