Whoa whoa...Thanks Ian and Bill.
Ian, I definitely like the Rover V8 but it's a lightweight (pun intended) V8 without a lot of punch. Even with good heads and webers or injection it's only going to be good for about 250-275hp max. That's only 50hp more than what I have with the Lotus four banger. I'm looking for more like 350-400hp.
I'm making probably 220ish at the crank with a stock 3.5, stock, cam, 8.5:1 compression, basic port matching and a damn good exhaust on my race car.
350-400 hp is very easily achievable on a Rover V8. It can be punched out to 5.0 and with Wildcat heads and a good injection system (I'd not mess with carbs) you'll see 400 hp and probably do it for $5k.
I woulnd't give up on the Rover V8 yet. I can pick up a Rover V8 block bare and carry it easily - all together it weights around 300 lbs. TOugh to be beat power to weight wise.