Ray Peters, Spokane Valley, WA, 1973 Plymouth Gold Duster 225cid

I've been a big Mopar fan for years, this Duster being my third A-Body. However, this is my first project car and, being somewhat new to all this, could use your expert opinion.

Currently, the car is totally stock with the 225, A904 Torqueflite, and 7 1/4" rear end. I have recently purchased an open 8 1/4" rear end (out of a '73 Duster - how convenient!) with 2.45 gearing and intend to swap it under the car along with your front disc brake conversion in advance of a new engine and transmission.

My question is this: I'm hoping to eventually replace the bulletproof but boring Slant Six with either a 318 or 360 with a SB 904 or 727 tranny as well as limited slip for the rear end. What gear ratio would you recommend? And what sort of performance I should shoot for out of the small block without overwhelming the new drive train?

The car will be used as a Sunday driver and drive-in cruiser, but the thought of embarrassing those unfortunate and misguided souls who still drive Brands C and F is intriguing.

Any insight you could provide would be greatly appreciated.

Thanks for your time.
Ray Peters