The 351W will out perform most big blocks. Also after owning my 393 custom built stroker and putting 650 miles on it I can not Imagine owning a big block and stoping for gas at every corner as it is the stoker motor drinks gas like crazy.Keep in mind these cars only way 2500 lbs. with motor and trans.After all it was the 289 cars that won most of the races back in the day.Buy kit car magizine and look at the Oltoffs cars all with small blocks and always winning and I mean always.Bob and Dennis Oltoff always use small blocks for you can make more power than you need and have a light car to boot.
PS.351W parts are alot easier to get and a huge selection of them compared to a 390fe