You are not getting any real bass out of a 4x6. The more mid and tweeter speakers you have right next to your head, the brighter it will be, and it will seem like there is less bass. Something to consider.
Right... (well sort of) They weren't pace trucks, nor were they ever promoted, or sold as such. They were the "official truck" of the Indy 500 that year.
My LQ9 had 85k on it. But I basically re gasketed the whole thing because I swapped the cam, put my 243 heads on it, and had to change oil pans.
And I changed the oil pump.