just the front and a cobra spring with an air bag in the pass rear and a v8 or 4 on the drive rear or you can just buy the llm g force kit made for drag racing
Just use them in the front. I wouldn't change the rearsprings , but an airbag did make a good difference on mine. While your changing the springs you might as well go with 70/30 struts or something like that, because it's not going to handle very well after those anyway.
My car was originally a 4-cyl car. It's had a 5.0 in it for 3 years now with regular strip use. I noticed no difference in ride height or ride quality when i put the V-8 in. After all, the swap only made my car weigh in 100 LBS heavier, that's including the 8.8" rear axle swap.
4 Cylinder Springs in the REAR and front with 90/10 Lakewoods will help get you the 60ft. times you are looking for. Remember, the rear needs to compress the suspenssion more than the front needs to rise, plus the weight transfer is much easier down than up on either end. I have run 4 cyl. in the rear with great success as well as many other 11 sec stangs I race with. Just my $.02
i agree with all 4 with a little support on the r.r. i went from a v6 to a v8 and it pisses off all my friends that i can kill them out of the hole on 235-65-15 tires
If the tires arent rubbing on the body dont use any support on the r/r. All the squat will help your launck. To maximize, switch to solid motor mounts, you wont be dissappointed.
i was thinken of going with 4cyl springs up front not only for launches but to lower the front a bit also...the front of my car with the stock springs sits to high...how much will they lower it?? also wheres the best place to get the springs??