My truck has a 1979 351m in it and the right head is warped I need to know if it's possible to put 429 heads on it cause I can get a set for free. I can't find a straight answer. Can someone please help me out

 

No you can not, wrong size. The only thing "Big Block" about the 351m is the bell housing bolt pattern.

 

The heads that will fit are 351 clevland, 351m, or 400 heads,
but if you can get them for free, Craigslist them.

 

It's not that kind of deal just a buddy had a 429 but he ain't giving them away just to me if they would work. After research and you guys I know a lot more about the 335 family of engines and I hear that 351c have better flow and performance. Now I just got to find some cheap. Just for now. I'll be upgrading when I get some better money. I found some on eBay $100 but I'd have to personally pick them up. Anybody know where I can get a set used but good condition

 

Why not get your heads rebuilt?

 

Because I wanted more power. How much to get mine rebuilt though at y'alls local shop. I know it will very. I just started looking into this

 

Way up here in Canada, it costs me about 300 to get a pair heads rebuilt, if the valves are re usable, more new parts, equals more money.

 

I think I'd rather just buy those ones for 100

 

If you want more power, a larger cam can do wonders as well as exhaust upgrades and changing your gear ratio to put the power band in your desired range.

I wouldnt trust Ebay for accurate sellers. Most people think they have a "Cleveland" when they just have a 351m/400. Those heads are most likely from the 351m/400, that is why they are only $100. True cleveland heads will go for a bit more.

 

I have a bigger cam already and the exhaust are flowmasters. I do need to change my gearing but besides that all I can think of doing is putting better heads in it