225 /6 at 250HP?

I did a draw thru turbo 170 slant, back in 1979. Now you must keep in mind, back then there was not much turbo info available to hot rodders. No, "boost timing masters", no AFR gauges, etc. I did break parts learning how to tune it. 65 valiant street/strip car. About 2900 lbs with me. mid 13's at 100 mph, and about 18 mpg on the street. 7 1/4 rear 3.91 SG, 22 inch tall slick on the track and a 28 inch tall tire on the street, 904 auto, with a 9 inch converter. Turbo was a Rajay off a Corvair.