Quote:
Originally Posted by NYC_SRT8
You can physically bolt a 5.7 head on a 6.1 block but you will have coolant leaks like its nobodies business. The 6.1 heads and block have a additional coolant port that the 5.7s doesn't have. I will try to find a pic of 6.1 and 5.7 heads gaskets to prove this.
If you want to build a 426 and have a 5.7 motor you will need the complete motor PERIOD! However, they do have 392's built off 5.7 motors that you can just bolt stock 5.7 heads on. I won't recommend that since they don't flow enough air to take advantage of the extra hp and the valve springs won't be able to handle the lift of a 392 cam.
|
This is completely false. We have 4 cars out there running 5.7 heads on a 6.1 block. Sharadon performance has a 5.7 head on a 6.1 block. You need to use 5.7 head gaskets on the swap and there will be no coolant leaks period. Also, Indy cylinder heads also sells a 426 with 5.7 heads on top as well.