Krebs what do you want to know about it?
Do a search for SR-71 and Buick see what you come up with.
2 V8 Buicks {initially, until buick parts became scarce then they used large block chevy's}.
16 straight pipe exhaust, 600hp, they both drove a vertical shaft connected to the underside of the J58 to start the rotation until the lubricating oils inside the J58 reached 70degC, otherwise the J58 couldn't be rotated.
The reason for the Buicks was at the time they didn't have air starting carts that had a sufficient volume of air to tease the J58's, they eventually got some, which was nice, because... honestly, you're inside a hanger 2 V8's with straight pipes damn near redlining, the dB level inside that hanger.. ugh... The airstart carts were quieter.
