You can use 2x4 if your just driving it or 3x5 if you wanna pull a house down and never worry bout frame tweeking....both of them no less than 1/4 wall though
nice! are you doint the wiring your self? im doing a sfbd and a gen 4 5.3/4l60e swap as we speak. and all i need is my wiring. i got some qoutes here and there but havent decide yet.
im getting current performance to make me a complete new engine bay harness as mines all cracked....they make cruise, tach and speedo work, also getting rid of abs....its a little pricy but worth it