[ventura7211]

Originally Posted by ponjohn

Yes they are 1.75" offset and IIRC they are from speedtech.

The offset of your shackles is why you hit the spring first.

The comp engineering shackles move the rear of the springs in 4 inches, makes room for a 315. If it were me and allowed, I would just relocate the front of the spring to inside the frame rail using a mount from a crossmember. Then get the leaf straight back and build a crossmember there to attach.

[ponjohn]

Originally Posted by ventura7211

The offset of your shackles is why you hit the spring first.

The comp engineering shackles move the rear of the springs in 4 inches, makes room for a 315. If it were me and allowed, I would just relocate the front of the spring to inside the frame rail using a mount from a crossmember. Then get the leaf straight back and build a crossmember there to attach.

agreed, like you mention, there is no way a 4" rear offset is going to be able to use the stock front location. I was not interest in fabing up a front mount.

I think the best way to approach these cars is a ladder bar deal. By the time you buy the offset hangers, move the spring perches, new springs,caltracs, etc., I bet you could do a ladderbar coil over for similar money.

[ventura7211]

Originally Posted by ponjohn

agreed, like you mention, there is no way a 4" rear offset is going to be able to use the stock front location. I was not interest in fabing up a front mount.

I think the best way to approach these cars is a ladder bar deal. By the time you buy the offset hangers, move the spring perches, new springs,caltracs, etc., I bet you could do a ladderbar coil over for similar money.

I've seen them used with the stock front location, I just don't like how it looks, very "hokie".

Ladder bars is close to half the cost of "stock" suspension. Split monos and cal tracs are $640 plus the cost of offset shackles, mounting pads, and hardware. Shock cost is basically the same since you would want to use a good double adjustable shock, you would just mount the springs on them with a ladder bar.

Originally Posted by BILTIT

Hmm, DSE states a 315 can fit with their 1.75 offset shackle.

''DSE's exclusive billet aluminum offset shackles are designed to relocate the rear leaf springs inboard to accommodate larger rear tires. They were computer modeled and optimized with FEA, tested, and then CNC machined. They relocate the rear leaf spring inboard to accommodate 335 tires ( with a section of 13.5" ) on a Camaro / Firebird or 315 tires ( with a section width of 12.6" ) on a Nova. The shackle offset is 1-3/4". Use along with our other mini-tub components to complete your project. Kit includes 4 offset shackles and Grade 8 fasteners. This is the ORIGINAL billet aluminum offset shackle! The DSE shackle is designed for maximum suspension travel. There are hundreds of our shackles on the road and track with proven performance. Do not accept any imitation!''

I think the section width stated is alittle narrower than most 315 tires though. MTDR 315's show a section width of 13.4''.

It depends on the rim the 315 is mounted on, you hardly ever see that in the specs. Also the 16+ inch rim 315s have virtually no "bulge". I've had a 315 on the back of my 03 Mustang using 17 inch rims, there is no way the 15 inch 315s would fit with out rolling the fenders and beating the wells to clear the sidewall.