HOFFMAN514

Hey everyone, I’m looking for some suggestions from someone who has been there. I have a 56 f100 that originally I had planned on going Coyote motor on. However I just got my hands on a all original 429 out of a 72 police car. I also have a set of freshly redone D3VE heads. I’d love to be around 500hp/500tq but to be honest anything over 400 would be acceptable. I have been looking at stroker kits, possibly boring .030 over. Top end kits with aluminum heads, etc.

So, the question is... what would be the best (cheapest and reliable...can those go together? Lol) option to hit the 500/500 goal? Keep the V3 heads? buy aluminum heads? Get the stroker? Skip the stroker and just bore it? I want to run pump gas and be able to drive it (not daily but fairly
often during the warmer months) I plan to do the work myself and sublet any machining to the local shop. I don’t want a race motor and if I am going to drop thousands I’d rather go coyote motor but being that I have this 429 with a freshly rebuilt c6 I’d like to use it if possible.

thank you in advance for any help and suggestions.

Mark Miller

Those D3VE Heads will need quite a bit of port work to be a half way decent head and getting 500/500 with those heads at 429 cubic inches and pump gas is going to be pretty tough to do IMO!!! A 521 .030 over 429 block and a 4.3" Stroker crank and some good Aluminum Heads cam,carb and intake would probably make 600/600 if not more on pump gas!!!Here's a little teaser my car and engine it's just 466 cubic inches runs on pump gas with some octane booster added in!!

PerryB

The D3 ('73) heads are big chamber (although still a closed-type) which makes for lower compression BUT when coupled with a flush flat-top piston you get a CR in the 9.7 ballpark and a combustion chamber that supports excellent flame propagation. You won't want or need to run a lot of timing. Probably only about 30-32 degrees total. The one thing you want to do with these heads though, is grind out the air injection lumps in the exhaust ports. It's actually an easy job. When you look into the port you can pretty easily envision what the roof contour should look like, just don't go too far and create a divit. Coupled with a Comp Cams 280 Magnum and a Edelbrock Performer RPM you have a truck with a moderate buckety idle, launches like a rocket and charges hard into the high 5's.
Mark's talking about quite a bit more of a build than I, but even "my" motor would mske that light old truck jump off the ground pretty good.

chimmike

Given how big that motor is I guess weight isn't a concern, but I'd go the stroker kit, aluminum heads route, but I'd consider a FI system. Given how simple they are to essentially plug and play now, seems more reliable and easier to tune than ever before. Not as simple as a carb, but better mpg and probably some more power too.

Post the results!

Brand

That is one good looking notchback. I always thought a Coyote notchback would be fun given how light those cars are.

HOFFMAN514

Brand

Mark Miller

Thanks,i've thought about a Coyote swap but probably couldn't get enough out of the BBF to fund the Coyote engine!!!You should check out the cars that run in the NMRA Coyote Stock and Factory stock classes with the Coyote engine there's even a Maverick in the Factory Stock class with a Coyote in it!!