Dyno testing a stock(?) 1972 440

Right. The best truck engine I've had to date came out of a 1973 Chrysler New Yorker. But, I ain't thinkin' truck here. What does it cost to buy a pair of HP manifolds? Lets put on those High Performance exhaust manifolds and see what happens.

RPM................TQ.................HP

2500..............413................196
2600..............405................200
2700..............398................205
2800..............403................215
2900..............400................221
3000..............402................230
3100..............401................236
3200..............401................244
3300..............401................252
3400..............394................255
3500..............386................257
3600..............386................265
3700..............374................264
3800..............372................269
3900..............360................267
4000..............354................269
4100..............353................276
4200..............344................275
4300..............337................276
4400..............323................270
4500..............310................265
4600..............301................264
4700..............289................258
4800..............274................250
4900..............268................250
5000..............250................238
5100..............249................241
5200..............236................233
5300..............220................222
5400..............210................216
5500..............198................207

We did this test as a personal favor for a friend, who I hope remains a friend after the test! I'm not buying these High Performance manifolds for "high performance".