Front springs

Mustang67Coupe · May 25, 2004

Hey guys, ive got a 67 coupe and it has 428 big block springs in it... Im putting a small block in (289,302 block). Should i replace them with something like a 620 or take the springs and cut them down to my desired ride hight? If i do cut them down how would it handle, shift weight and all that stuff?

Sorry if i didnt supply enough info, thanks for your opinions guys!

DukeGnarley · May 25, 2004

i would go with the 620's, i think the small block weighs a couple hundred pounds less, the big block springs might be a bit stiff.

NorCal66 · May 25, 2004

DukeGnarley said:
i would go with the 620's, i think the small block weighs a couple hundred pounds less, the big block springs might be a bit stiff.

Yep, I'm with that. I'd imagine your front end would be sittin up a bit as well.
Just curious, why are you going from a 428 to a 302?

Mustang67Coupe · May 26, 2004

The car had a 428CJ in it before i bought it, then he removed the enigine before the sale, couldnt blame him with that engine, and it saved me alot of money for the car without the engine..

Mustangs are better with small blocks in my opionion anyway

67GTA-FB429 · May 26, 2004

620s are a lot stiffer than the factory "big block" springs.

67GTA-FB429 · May 26, 2004

Put the new engine in, and check the ride. Only make one major change at a time.

Mustang67Coupe · May 26, 2004

so you would say stick with the big block springs? or is it worth the money and go with 620's performance wise

Snail50 · May 26, 2004

I have 620s in my 67 w/289, and I like them so far. Of course that's subjective; they are stiff, but the car handles very well.

bud4660 · May 26, 2004

67GTA-FB429 said:
Only make one major change at a time.

Now you tell me......

Oh and I have a big block and I am putting in the stock small block springs.

Max Power · May 26, 2004

The 620s are nice, and made for your application. They aren't very expensive, and much easier than screwing around with cutting. I am an advocate of cutting only when there are no other options available.

67GTA-FB429 · May 26, 2004

I would put the new motor in, drive it and see if you like how it feels and looks. The 620s will be a stiffer-harsher ride than the orginal springs. You may want to got with stock replacements or some 540s. Also you can always go with a softer spring adn a stiffer shock

I went with 620s to hold up the weight of the 429 After playing with Mustangs for 20 years I have found it is best to do one major thing at a time.

BLUECOBRA01 · May 26, 2004

I am running a 302 with 6 banger springs and 90/10's
now thats weight transfer

vobraman · May 26, 2004

bluecobra
what shocks do you have in the front ? Do you drive the car on the stree alot with the 90/10 shocks ?
thanks

skywalker · May 26, 2004

Max Power said:
The 620s are nice, and made for your application. They aren't very expensive, and much easier than screwing around with cutting. I am an advocate of cutting only when there are no other options available.

Cheap indeed, I paid $96 for my pair (that's like what $48 per spring?)

Don't cut, you'll be plenty happy with the results of the 620s.

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