rmeadie
11-12-2003, 08:44 PM
I just got a 1970 Skylark Custom convertible with a Buick 350. Engine code is SP 254. Is this the 285HP or 315HP version. I believe the only difference is the compression ratio.
View Full Version : 1970 350 rmeadie 11-12-2003, 08:44 PM I just got a 1970 Skylark Custom convertible with a Buick 350. Engine code is SP 254. Is this the 285HP or 315HP version. I believe the only difference is the compression ratio. HW70GS350 12-06-2003, 09:41 PM According to my numbers book the SP is the higher compression motor, (315hp). This is the same code on my 70 GS 350 engine |