Chassis identification help

[boogityk5]

I'm going to be traveling to check out an older model lightning, where on the frame would the chassis number/brand be stamped thanks

[TFC4]

IIRC, the chassis number is a weld on the inside of (not a nice word)(not a nice word)(not a nice word)(not a nice word)pit, drivers lower left. Also, I believe all lightnings have a lightning bolt weld on both sides of the frame behind the front wheels just past the bend.

[mudeater18]

Lightning Chassis, # 606-878-RACE

[boogityk5]

Thanks for the info!