Just finished my 408 in my 1970 dart. Went with Dougs from autozone with a 20% off coupon and free shipping. Got them under $500.00. passenger side needed torsion bar and drag link out. drivers side needed motor raised and a lot of this and that. Finished product is super. Plugs are easy and oil filter accessible. they also don't hang low so i'm happy but wouldn't want to do it again for a few years. I have a bend-pak lift which helped my old back a bunch. They are necessary for a built engine and man do they sound good!