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**Captainfab** · 10-17-2015, 11:16 PM

The Comp 305H Magnum is a pretty big cam. Most don't consider a 292H Magnum streetable. You are going to need more than 9.5:1 compression with that cam. As just a guess I'm going to say you will need 10.5 to 11.0:1 static compression. The dynamic compression will need to be calculated with the 305H Magnum cam. A 3000 stall may not be enough.

10-17-2015, 11:16 PM	#3
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: help with newer top end combo The Comp 305H Magnum is a pretty big cam. Most don't consider a 292H Magnum streetable. You are going to need more than 9.5:1 compression with that cam. As just a guess I'm going to say you will need 10.5 to 11.0:1 static compression. The dynamic compression will need to be calculated with the 305H Magnum cam. A 3000 stall may not be enough. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE