Thanks guys for the information sofar,all very helpful.

I have one more question regarding engine mount.

If i were to install two beech bearers,set at 3 degrees down,and screw a ply plate to these,with a cutout also at 3 degress,what thickness should the ply be,for a 1,20fs, say 1/4"?,would this be ok.
Adjusting side thrust would only mean cutting anew plate,with increase/decrease thrust angle,down thrust would just need alittle shim under plate.
Looking at plan etc,if i were to angle firewall etc,its going to make things alittle difficult,as new firewall will have to made up,to allow for angle,also its going to effect the rest of the front end,and new parts will have to be made up.
Using the bearer method is going to make things alot easier overall.plus it will keep everything else to plan.

Your views, thoughts and suggestions please

Eindecker