Stang is going to need a new motor

why not put GT40 heads on that one and keep the motor???

It just may be that the cam is so worn that you don't get much in the way of valve lift, thus the lack-luster performance.
Have you have a compression test done ?
Perhaps just having a stock rebuild done and maybe add a perkyer Cam would do it.
300hp isn't much to ask.
there's Crate motors out there at 500hp
In fact, it isn't even Horsepower you should be looking at, it's Torque.... the more the btter.
The only time lotsa Horsepower is needed is very very high speed driving. The Horsepower helps you over 4,000rpm
It's the Torque that makes it a tire smokin monster !
Look for something (or build something) that gives you lots of Torque (350 ft.Lbs.)early (2,000rpm) and you'll be VERY happy with the performance... I garantee it.

Mach1steve
www.muggziperformance.com

xj220 said:

We had a compression test so that's how I know we're losing pressure. I'd love to get gobs O power but there's two limiting factors: 1.money 2. rear gears (which goes back to #1). I forgot to mention too that oil pressure is low in the beginning and takes a bit to get up. The engine is just tired.

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neither of which mean a completely gone motor, low oil pressure is caused by the compression being sorry which is caused by the heads and cam, get new heads and cam and go with it

But Cheap power from a tired motor?
Figure out how much you will spend pulling all the parts togeather,
the machine shop$ and the wait.
A Crate motor looks Real Good.


PB

what are your compression readings?

65fastback2+2 said:

neither of which mean a completely gone motor, low oil pressure is caused by the compression being sorry which is caused by the heads and cam, get new heads and cam and go with it

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Compression and oil pressure are not related. In fact, an engine could have all the oil pressure in the world even if it had 2" holes drilled in the pistons. If there is excessive blow-by from having worn cylinders/pistons, you will have a problem with oil consumption, but not oil pressure(so long as you haven't burned all the oil).

I would pull the heads and check the ridge at the top of the cylinder bores. If it is excessive or is oblong(warped cylinders), you'll need to rebuild the shortblock. If the ridge is minimal and true to shape, I'd be real tempted to just install a new oil pump and see if that corrects your oil pressure problems. You might want to pull a rod cap and inspect the bearings while you're at it, they may be ok. My point is, with regular oil changes, a short block will last a lot longer than most people think. You may be fine with an oil pump and a new set of heads and a cam. Only way to know is to start tearing it down.