Wheel spacers on wheel spacers ???

[Wyvern]

Wheel spacers on wheel spacers and other questions

Hello.
If I may ask a question and look for input please

I am desperately trying to find 17" wheels (Not BIG $$$)
75 Widebody ...
On the car now are 15" BBS
Rear: 930 rear trailing arms, 9" wide, et 2.1
Front: factory spacers up front 8" wide, et 10.6
I have a safe 3/4 inch of clearance to the fender (would like to "close" that up)

Found a nice set of 3 piece twists but the front et is 28 and the Rear et is 15
(Twists and spacers were not my first option. same thing in a straight spoke or web and I would already have them)

So my questions are:
For the same front fender clearance I would need a 15mm spacer
do I get new spacers altogether or would I add a 15 (or more) spacer to the OEM ??? Photo of front below.

The rear a 15mm spacer would put et almost the same, PLUS the 10" new rim would fill me out 1/2" more. Good option ?


I thought NO spacers would be best and just cant find them in sub $3000 option

Do I keep looking ?
Is an 11" rear "to much" for a stock 75 2.7?
Heck I could go with 9 and 11s..

Gosh I have been looking so long I keep confusing myself.

1/2 tempted to put race tire on my 15s 225 and 265 (or 235 / 275 combo)
I see postings bout full tread r comp (treadwere 100 maybe 140)
would buy those in an instant ... I just cant find them


Thanks guys


Front


Rear