253 conversion.

**Mazdragon** · 06-07-2010, 10:18 PM

thanks for the info. Useful for me too in some ways.
However, I want to convert from std 6 (202) to a 308, straight gas. Would i use the same considerations as u've described for the 253? i'm guessing i'd have to do something about the suspension as it's a lot heavier? and figuring the diff would need changing? not sure what's in there, Beigy is stock std so my guess is whatever they came out with. I'm also wanting to do the mild cam thingo, nothing too radical, just a good rythm and sound. I'd like to keep it a manual (currently 3 on tree), and am thinkg of going 4 or even 5 speed manual, but hav peeps telling me that I should go auto instead. Any ideas, advice? I'll be removing the petrol totally and putting in a second gas tank, the dizzy's going to be set up for gas too, as well as the heads and of course the cam. I don't understand a heap about modifying, so am fishing for info at the mo.
Will be grateful for any feedback.
thanks
Maz

**ozbox** · 07-07-2010, 09:55 AM

maz,beigy will have a diff thats commonly refered to as a small 10 bolt..beigy is wb correct?.
the gears in a small 10 bolt are the same as a banjo but fine spline axles..no burnouts and no major acceloration and it will hold up..your tailshaft is already a v8 configuration as all wb came like that...so all else is as i have stated..whern you get to it if you need any advice just call...or send pics...:Chin:

**Mazdragon** · 07-07-2010, 07:27 PM

NOT that i want to do burnouts

, but what diff should i get to not run the risk of blowing it up? u know, like a little harder acceleration at the lights or such.... and thanks, I may just be pickg your brains when the time comes.... anything else I need to consider?

**ozbox** · 07-07-2010, 07:55 PM

3.08 ratio large 10 bolt from any v8 ute/van or any 1 tonner diff 6 or 8 is a popular ratio and the right diff.your backing plates brakes,cables,lines are all the same so you can use all them..just need a housing and centre with axles..always look inside to check how good they are and to check the ratio as its stamped on the crown wheel..1 tonner diffs have a larger pinnion which meens that you would need the u bolts and a step down universal...im going to do some more technical type articles and post them up and diffs is one i am going to try to explain...:eek:...:Hair:

**abncraig** · 07-07-2010, 10:20 PM

Originally Posted by ozbox

3.08 ratio large 10 bolt from any v8 ute/van or any 1 tonner diff 6 or 8 is a popular ratio and the right diff.your backing plates brakes,cables,lines are all the same so you can use all them..just need a housing and centre with axles..always look inside to check how good they are and to check the ratio as its stamped on the crown wheel..1 tonner diffs have a larger pinnion which meens that you would need the u bolts and a step down universal...im going to do some more technical type articles and post them up and diffs is one i am going to try to explain...:eek:...:Hair:

Loving your tech articles Oz keep them coming learning heaps especially when a picture means a thousand words you could tell me 100 times and still couldn't get it but to see the pics awesome..

**Mazdragon** · 08-07-2010, 01:40 PM

next question, (and yes beigy is a WB), i have factory power steer and air con.... to use the same would mean different brackets etc wouldn't it? cos the mounting is different? can i use the 6 cyl components for 8 cyl or do these differ as well. Also assuming would need starter motor for an 8 and can't use the 6? Yeah a lot of questions and when I go shopping, i want to be informed so i know what i'm lookg for and at. Thanks heaps for help so far Greg.
Maz

**ozbox** · 08-07-2010, 02:00 PM

ok maz,you can use your alternator but you need v8 bracket..you need v8 starter..you can use your power steer pump and lines and box but you will need a v8 power steering braket and crank pulley which is a 3 row for air as well..your a/c pump is ok and its associated lines etc but you need v8 brackets..when i say v8 brackets and pulleys i meen hq to wb not commodore...your a/c maz..is it a big arse harrison compressor which are black or is it a small sanden compressor which is silver/ally?..reason i ask is if it is the small one you need the bracketry from an 83/4 wb statesman that runs the small compressor..