Caseyrhe 650 Report post Posted June 25, 2019 See pics, just pulled the taller(rusty with pink stripe) of the two out of a 70, 302, auto, ps car. The shorter (black) spring came out of a 69 390 auto ps car. The shorter is also 1/8” bigger in diameter Putting a 428 in the 70, already beefed up the shock towers and lowered upper control arm 1” for doing Shelby drop. Should the black 390 be shorter, or did someone already cut the spring in lieu of dropping upper control arm? Quote Share this post Link to post Share on other sites
Caseyrhe 650 Report post Posted June 25, 2019 Maybe someone could measure the height of their springs standing upright, total length to top of coil. big block and small block Quote Share this post Link to post Share on other sites
Caseyrhe 650 Report post Posted June 26, 2019 My springs are meas Big block 15 1/16” small block 16 1/8” Quote Share this post Link to post Share on other sites
1969Fstback 58 Report post Posted June 26, 2019 Just an observation but the springs have the same number of coils. The small block spring has more space between the coils. Just googling some big block springs from drake and such they also have 9 coils. I have no idea if that is scientific comparison or not. Just an observation. Quote Share this post Link to post Share on other sites
Brian Conway 264 Report post Posted June 26, 2019 Picture is of my 69 spring. 428 car and can only assume it is original ? Brian Quote Share this post Link to post Share on other sites
