Engine Pad Suffix Identification

 SUFFIX
 RPO
 ENGINE
 HP
 TRANS
 OPTIONS
HE
Base
327
300
Manual
---
HH
Base
327
300
Manual
A.I.R.
HO
Base
327
300
 Powerglide
---
HR
Base
327
300
Powerglide
A.I.R.
HT
L79
327
350
4-Speed
---
HD
L79
327
350
4-Speed
A.I.R.
HP
L79
327
350
4-Speed
A/C, P/S
KH
L79
327
350
4-Speed
 A/C, P/S, A.I.R.
IL
L36
427
390
4-Speed
---
IM
L36
427
390
4-Speed
A.I.R.
IQ
L36
427
390
Powerglide
---
IR
L36
427
390
Powerglide
A.I.R.
IP
L72
427
425
4-Speed
---
IK
L72
427
425
4-Speed*
---
* M22 Transmission