Need some ideas
Stage II Jantzer ported heads. with hollow stem valves and sodium filled on the exaust side. VERY nice valves.
The heads flow 296@.570 if I recall correctly. Also the mid lift numbers are strong,
They have REV dual springs/titanium retainers, new stock gm seals & locks. They are GM 241 casting centerbolt heads (the best ones). They were milled .035".

