489 BBC Specs
4.290" bore x 4.250" stroke= 491.4 c.i.d, 6.385" rod length ,11.5cc dish piston's = 8.2-1 comp. with 119cc heads. 325cc int. runners, 2.30" intake valves, 1.88" exhaust valves. Hyd. roller cam with 244 degrees int. duration at .050" 253 degrees exh. .630&
