Reliable 150 HP as a daily driver using A series in an 800kg ute.
You can make it reliable(just)for big money,but it wil be an absolute piece of crap to drive on the road,you will have nothing under 3-4 thousand RPM and you will be changing gears at around 8-9 RPM+ with back tyres lighting up just before the cops nail you and cart your pride and joy off to the pound.
If you have not done one already,do an advanced driving course,once completed do some track days with proffesional teachers to learn how to handle the new power to weight ratio comparable to a Porsche GT3 but without the brakes and handling.

I offer my advise based on experiance and competition results over many many years,it's here to take or leave

... + a cam and higher compression. And you would probably want to balance the bottom end as well. The stock clutch probably wont hold 140hp and what gearbox do you have currently?

he wants a mean a15 not people being mean so standard it makes 81 hp ? with a lil head work your webbers and a nice exorst it would be getting close to what you want.

Trust me you and your perants will be happier with a Honda - 140hp out of the box.

btw he sold the motor the same day i asked bout it

because mine motor is pretty much brand new so wots the point? i have everything done to mine except a decent bore,cam and 40mm webbs...so i think its more logical to do mine...

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Why not buy Sidedrafts already built A15 for $2300 to build a simaller engine would be costing way over $4k. Then you have to buy a set of carbs dizzy extractors ect ect its going to be quite expensive. Even if you where to spend say $2500 on a basic A15 build it wouldnt get you that much.
Out of interest I had twin 45mm webbers on my A14 they where fine you just need to jet and use correct size chokes ect.
Cheers Andrew

no i said ill sell my buggy and see...i also said money isnt a issue...ill pay anything as long as it has atleast a realiable 150hp...ive gota buggy forsale for 7800 and that seems as if it will be going soon..so with 7800 i think ill afford a decent motor dont u?...also got perants

Without wanting to be a smart arse I offered you a fully built motor for $2300 and you couldnt afford that much, to rebuild one to the same specs would cost double that.

so has anyone got a good idea of a budget i should have for a full build from jts?