libertyson

I am putting a 455 w-30 into my g body. I want to install the ram air duct through the bumper....Has anyone attempted this and do I need a different hood?

Funkwagon455

The big block conversion has been done many times into G bodies with success. You will sacrifice the AC housing, and if running headers they will wrap the outside of the frame. It will be significant work and even more money if want it to look and function right. If the engine you have is in fact a W30 engine with F heads, aluminum w455 intake, carb, ect...... I would very strongly recommend selling your engine to a restoration candidate and using the pile of cash you would have to find another 455 to build with aluminum heads and to your chosen specs with more power/torque. Love to see the results

firefrost gold

Here are 3 shots of a 455 in a G body that was at a show. Notice the angle cut on the air conditioner box.

svnt442

Firefrost that's not an A/C box, that car is a non A/C car and that configuration is closer than the A/C box would be.

firefrost gold

OK " heater core box" I was just showing how it was angled Dont know if it is stock or weather the owner cut it and reshaped it. Dont know who owned it.

dc2x4drvr

Robert Powers had a fast 455 G Body, check his site out, lots of good info.
http://www.robertpowersmotorsports.com/

libertyson

I have seen 455's in Gbody's and still managed to keep ac box.....You have to use stock valve covers but it can be done.

Thanks for everyones input.

I was just wondering if you can do ram air throught the bumper....has anyone tried it?? Thanks!

rocketraider

I think there were a couple years that had air slots in the bumper, but seems they're way inboard which would make plumbing very convoluted. Do you have ground clearance enough to use repro 68-9 W30 under-bumper scoops? You'd still have batteries, vapor canisters and all that to work around or relocate.

If this is a gennie W30 engine with correct heads/intake, I would also move it toward someone looking for restoration parts. You could make some $$$ doing that, and have enough to build a serious 455. There's still a good supply of C/E/G/H head cores available that respond to work just as well as the D/F/K. You can even make J's work very well, just more work to get equal results.