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68 Fastback questions

778 Views 9 Replies 5 Participants Last post by  dodgestang
My 68 GT mustang It is a 100% original car (never been restored) but the 390 seized and was replaced.

The outside has the usual rust, nothing serious all repairable.

What would its value be at? I've been offerd 35,000 with no intention of selling but just curious.


The motor replacement is a 351C 2v, I'm wondering what its capable of. The previous owner said it was fully built up.
I've never been through the motor and it has been in awhile.

It idles about 1200 rpm, with a 850 holly carb, and edelbrock intake.
Its got a 4 speed in it, with a hurst supershifter kit w/e installed.
I was told it was putting out around 400 at the rear wheels,

but is it possible with this motor?

Would this motor be worth keeping and useing, or find another 390 and performance that out?

The fastback is full GT all the luxaries with 4.11 limitslip rear
This car may be all original but in the future its going to be a high performance restoration for me and my dad.

I hope someone can answer my questions :)

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I agree with Mustang Bradley for the most part. The value of anything is what someone is willing to pay or the market will bear.

Since you can never claim the car as a "numbers matching", with the original 390long gone, putting another 390 back in it is a matter of debate as MustangBradley states.

My 68 fastback has a 351C.Why,....... several reasons.
1- I'm somehwhat "old school"
2- I wanted to build good hp with the most naturally aspirated power of a small block using stock block, heads, crank, etc. I never intended to race it but wanted the power just becuase.
3-The suspensions on these cars dont do so great or handle so well with big blocks. Most informed people will tell you thast you will crack or damage the shock towers unless you have reinforcements installed. If you do a suspension upgrade, it makes a difference but its also big bucks and is usually more than just the suspension.

Pound for pound and dollar for dollar, the 351C can make more HP per cubic inch than the 390.

Therefore, I choose the 351C. I absolutly love this motor. What a building block for HP
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