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I currently have a non-running 351w in my 66 coupe. I would love to rebuild it however I'm really considering a 302 just to have more space and keep the 351 cast heads. This will be a weekend driver and not a show car by any means. I sure loved the power the 351w gave me but the overheating problems and timing problems were gruesome. If I get a 302 what type of block should I get? Pre 80-s? Something newer. Roller cam compatible? The 351 will cost about $1900 to rebuild (I dont have the time or the skills). Any advice will really help.
 

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if youve got the 351 why not sort out the problems with that and get it running.when you say non-running,whats wrong with it?
does it need to be rebuilt?
 

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Why not just get a Ford crate engine and sell off the 351W parts. It'll cost more than $1900 though. Putting the 351W heads on a stock 302 shortblock just kills the compression and you'll have a lot less power than you had before. On the flip, a properly built 351W will not tax the cooling system any more than a 302 would. As for "timing issues", on a good engine once it's set there is no more messing with it.
 

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i put a 302 in my mach 1, i miss the torque of the 351w. I also used an 84 block with huge chambers and my 70 351heads and bumped compression upto about 9:1. It tuns pretty decent except for the lack of torque. I'd rebuild the 351.

_________________

1969 Mustang Mach 1 4spd 351W, (temp)302
1997 Cobra RIP 4V Motor
1970 Dodge Charger R/T 440+6 4spd
2002 SVT Lightning, K&N, Trac bars, 555Rs
1967 Mustang Coupe 302, 3spd, 3" of primer, ugly

<font size=-1>[ This Message was edited by: 19mach69 on 5/4/06 9:19pm ]</font>
 

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rebuild the 351, Only way to go IMHO
 

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Rebuild the 351W and have the shock towers shaved while it's out. That'll give you all the room you need. Overheating problem my not be the engine. Stangs were real bad for that. Go to a 3 row radiator, and open the lower valance where the license plate is, as the GT350s were. Replace the waterpump with a high volume alum one, and don't use universal flex hoses. They actually flow less water due to all the ribs in them. Other thing is the pre 70 SBFs had the waterpump inlet on the passenger side as is the engine outlet. This was also the cause of over heating problems. Switch to the driver's side radiator type, waterpump and damper. That'll also help cooling.
 

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I still have a 351w in my 67 and have most parts for a 393-408 stroker but now I'm thinking a 289-302 based twinturbo would make as much power yet fit better,be more eficeient and more stealth in idle and sound except for the turbo whine. I have seen many articles that use perfectly sized T-bird turbo coupe junkyard turbos, 450-500 hp is pretty common even with a stock HO hyd roller cam, at cruise a twin turbo 289-302 can pull 25+mpg's with OD, Icant see a 408 pulling much more than 17-18 at best.

Also, the 393-408 will make so much low end that traction could suffer in the 1/4 but a smaller twin turbo might kick in power at a more usable rpm without smoking the tires off the car.

my 67 vert http://htwheelz.smugmug.com
 

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Sup hotwheelz67 you remember me I bought your holley projection off you and the aluminum radiator? I am planning on doing the same thing but I wanted to put a 01-04 cobra motor in mine with a supercharger. Is this possible to do without cutting the crap out of the car?
 
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