Big Block in a '68 Impala - Advice Needed
I am putting a Big Block into a 68 Impala, and need some advice on engine mounts/frame brackets. It has Hooker headers, sized for a 502 which is the engine in the final plan. Right now it has a 454 from a truck with a 4L80E trans.
The issue is primarily that the headers don't clear the steering box. I believe there are two sets of frame brackets for the engine mounts, and two sets of engine mounts, one for SB and one for BB, but they end up the same overall height with the BB brackets being shorter and having more rubber in the mounts. Right now, it has the frame brackets that came with the car (SB) and SB engine mounts. I also fabricated 1/2" spacers that are installed, and give what I would call minimal clearance to the steering box. Only one pipe is bad, the rest are acceptable. But I don't really like the spacers.
The options I see are:
1) Remove the spacers, bend/dent the crap out of the headers to clear the steering box. The good point about this option is it keeps the factory alignment as much as possible.
2) Cut & weld the brackets to add the 1/2" of height, and modify the base to line up the mounting holes. This provides acceptable clearance, but I am concerned about maintaining alignment, especially driveline angles in the plan view, and engine level in the front view.
3) Any good ideas from someone who has done this before
Any thoughts appreciated.