Ummm...
G Body Sub Frame Floor Brace - Trick Chassis
1-5/8″ .083 chromoly Floor bracing Builder kit TRIM TO FIT Main tubes will be pre notched. YOUR STOCK transmission cross member does not fit after the floor brace kit is installed. 25.5 Bars are only a seat bar and 6A 6B bars. If you don’t have stock floors, a stock firewall, and the oem door...www.trickchassis.com
$700 US?! Nope. I'd buy the tools first. Also that doesn't address my problem area in the rear.