What to build...427 vs. 468

[mountainexplorer]

I'm debating on what motor to build for my '80 GMC. It will be entered in local mud races, but also driven on the street once in a while and alot off road. My options are a .060 over 427, std. steel crank, domed Keith Black pistons, and open chamber heads. Or, a .060 over 454 (468 ci) with the cast crank, flat top pistons and closed chamber heads. The truck will have 40" tires, 4.56 gears and a 4spd/205. Which motor sounds like the best application?

 

[Blazer79]

There's no replacement for displacement. That's my 2 cents. /forums/images/icons/smile.gif

 

[Tommy]

I have a 427 now, but I'm hunting a 454 to put in, like he said, no replacement for displacement

 

[thatK30guy]

Do the 468. It makes more torque.

The 427 is more a high winder, resulting in higher end motor.

 

[zakk]

468 on acohol with a 8/71 BDS blower and Litenfielder FI./forums/images/icons/smile.gif

but that is after I win the lottery

Eagle Racing engines makes a really nice, all aluminum 632 motor. I heard it has pretty good HP/forums/images/icons/laugh.gif

 

[4X4HIGH]

Like they say " no replacement for displacement". " when in doubt, bore it out" Go with the largest engine you can afford to build.