Most Valuable would probably be the 351C 4V, IMHO. That being said, it was the only 4V 351 available in 1970. You could not get a Factory 351W 4V in 1970, only 1969. In 1970 you got either a 351W or 351C with 2V or a 351C 4V.

 

I don't think the value is different for a Windsor vs. Cleveland. So, if the '70 Mach in question was a 2 bbl motor, it is what it is. Some people prefer a W, some prefer a C. Windsor is lighter, better oiling, cheaper parts. Cleveland is better valve train/engine breathing.

As MagMustangs said, only a Cleveland was available if the motor was a 4bbl in 1970. That will always be worth more if all cars were the same otherwise.

 

In this day and age, the one which would be worth more to the car ultimately is the one the car was born with...

 

Oddly, there's no way to tell if the car had a 351W or 351C 2V in 70, Ford called them both engine code "H". You didn't get a choice, BTW, Ford used whichever they felt like that day.

I have seen a few 70 351W cars. Oddly, they all had shaker ram air. Musta been Ford's little joke, building 1970 351W 2V ram air single exhaust cars.

 

This ad is in Nashville Craigs List. Not my add just thought it was interesting.

1970 Mustang Grande Coupe 351W *RARE*

 

4V motor is at least a 10% premium over a 2V. H code cars motor does not really matter.

 

theres much controversy over the W and C on the 70 M1.
Ive never seen a 70 W M1 but others say they exist and can prove it. I dunno I cant argue with someone who says they seen and and can prove it..

All the Ford Literature of the day and I have plenty say. "introducing the new
351C 2V as the base engine for the 70 M1" or similar wording to that.

 

Have a Marti report on this one.



Heres one I,m looking at .. #,s matching...

OF05H......
0 = 70
F = MICH.
05 = MACH 1
H = 2V

On bottom or report it states ...

Your vehicle was ordered with the following options ..
351 windsor motor
Black hood stipre
Rear deck spoiler
FMX Select shift criuse O matic
F70 14 Belted Tires w/ Raise white letters
Power Front Disc Brakes
Power Steering
AM Radio
Your Car Was Actualy Produced On September 29, 1969- seven days behind schedule.

I never thought of the 4V only being a Cleveland motor ,
And just seen it listed that way recently..
Also 2V C or 2V W either way makes sence, also early 70,s with 351W and later biulds 351C

 

We have had just as many 1970 351W 2V as we have had 1970 351C 2V, quite a few. Never had one with Shaker, but I could see Mach 1 with that. 22GT is right, there was no way to know what you were gonna get with an 'H' Code.

 

but the OP is refering to M1's

the other models came either way and those i have seen with both engines in them

 

In 1970 H code would be whatever the plant had on hand at the moment, till they ran out of the W's, All M codes were C. (even tho there are rumors of a few leftover W's got stuck in)

As for the Shaker, at the time it could have been added as a dealer installed option.
I bought a 70 Boss 302 in early 71 off the local Ford lot, I had the shaker added in the deal costing a $1.65 rise in the monthly payments.

 

like i said i cant argue with that but all the sales brochures say other wise lol.

give marti a call maybe he knows or has info on it