Converting Starfire 4 to 308

[Vin999]

The v8 disc brake diffs also came with a 2.60 ratio, which also had the smaller universals (commonly called 6cyl unis).....
Strut wise...You can use upto and including VP.....It is actually better to use VN/VP bearing plates, as it allows more scope with camber/caster changes, when compared to pre-VN.

Generally (unless factory option ordered) the V8 253’s got the Salisbury 8bolt diff single pegger same as the 6cly with the smaller Uni joints. The 308’s got the larger 10bolt lsd diff with the larger Uni joints, the same larger uni’s were also used in the ute/statesman of the same time.
That’s 10 bolts on the inside crown gears not the 10 bolts on the outside cover of the smaller 8bolt diff.

Replacement strut bearing plates are the same from VB/VL to VP & VG & VQ S1. They just have different part numbers from the sellers. For VN/VP/VG/VQ the 3 studs are just moved to the different position marked on the bearing in the same orientation on opposite strut towers which keeps the 10mm OEM offset for the latter VN/VP/VG/VQ models.
Rotating the bearing studs 1 hole forward or back will give a 1 degree positive camber change and also have a small ½ degree positive/negative caster change depending which direction you move studs and helpful when slightly lowering car but not on super low.

Useful info for OP to know since he is wanting to change the starfire to 308 V8 and needs a V8 diff to match.....Using 2.60/2.78 diff is stupidly low ratio and even the V8 would go slower than the 4cyl starfire higher ratio but the V8 could probably get nearly 100kmh in just 1st gear and avoid gear changes so not reallyyyyy suited for anything. A 3.08 is better start off for 308 V8 for economy & highway speed cruising but 3.36/3.55 diff would help with quicker acceleration more so in lower geared 4sp manual or higher geared auto. The 2.60 / 2.78 ratio diff is more suited for 5 sp boxes of the Sillica aka celica kind.

 

[vc commodore]

Generally (unless factory option ordered) the V8 253’s got the Salisbury 8bolt diff single pegger same as the 6cly with the smaller Uni joints. The 308’s got the larger 10bolt lsd diff with the larger Uni joints, the same larger uni’s were also used in the ute/statesman of the same time.
That’s 10 bolts on the inside crown gears not the 10 bolts on the outside cover of the smaller 8bolt diff.

Replacement strut bearing plates are the same from VB/VL to VP & VG & VQ S1. They just have different part numbers from the sellers. For VN/VP/VG/VQ the 3 studs are just moved to the different position marked on the bearing in the same orientation on opposite strut towers which keeps the 10mm OEM offset for the latter VN/VP/VG/VQ models.
Rotating the bearing studs 1 hole forward or back will give a 1 degree positive camber change and also have a small ½ degree positive/negative caster change depending which direction you move studs and helpful when slightly lowering car but not on super low.

Useful info for OP to know since he is wanting to change the starfire to 308 V8 and needs a V8 diff to match.....Using 2.60/2.78 diff is stupidly low ratio and even the V8 would go slower than the 4cyl starfire higher ratio but the V8 could probably get nearly 100kmh in just 1st gear and avoid gear changes so not reallyyyyy suited for anything. A 3.08 is better start off for 308 V8 for economy & highway speed cruising but 3.36/3.55 diff would help with quicker acceleration more so in lower geared 4sp manual or higher geared auto. The 2.60 / 2.78 ratio diff is more suited for 5 sp boxes of the Sillica aka celica kind.

You don't know much about strut bearing plates do you....

VN and VP bearing plates interchange with pre-VN but have a wider scope for camber and caster adjustment....Do some research on that before commenting...That rotation 1 hole changes the camber 1 degree is a load of crock....1/2 degree yeah on standard height yeah, but degree no f...ing way

I mentioned about the tailshaft stuff, just to make sure that they weren't stranded through the conversion, seeing there is a few variations....If you knew anything you would have known that

Diff ratios play a big part in what you plan to do with the car.....You want snappiness off the line, go the 3.36 or 3.55...You do alot of highway miles, go the 2.60, 2,78.....You do a bit of highway, bit of round town, 3.08 or 3.36.....

Me personally have 3.08, with a 5 speed Supra, which I find perfect for my application of round town and highway usage.....

 

[Vin999]

You don't know much about strut bearing plates do you....

VN and VP bearing plates interchange with pre-VN but have a wider scope for camber and caster adjustment....Do some research on that before commenting...That rotation 1 hole changes the camber 1 degree is a load of crock....1/2 degree yeah on standard height yeah, but degree no f...ing way

OMG you even dispute actual Holden Factory specs and bearing manufacturers specs, next you be saying wheel alignment machines used today are wrong as well.
Seems you don't know about front stut bearings considering they are the identical for those models. Maybe the struts were changed, you better have a look and report back haha

 

[vc commodore]

OMG you even dispute actual Holden Factory specs and bearing manufacturers specs, next you be saying wheel alignment machines used today are wrong as well.
Seems you don't know about front stut bearings considering they are the identical for those models. Maybe the struts were changed, you better have a look and report back haha

Don't need to look to hard...VN and VP bearing plates allow more scope of adjustment when compared to pre-VN...

Go look at pre VN and VN and you can see the difference....

Tip...Alignment machine specs are loaded in by humans...Humans make mistakes when loading these specs in...I see it quite reguarly```Do you?