Holy_Joe

I have a 302 H.O. in my mustang, its nice to have one but, i was thinking about swapping it out with a powerhouse. I got the cash to do it, I was thinking of building an improved 429 Cobra Jet smallblock for it. Forty years ago it it came out of the factory with a stock 440 hp. It will fit but, with major relocation of some parts. Or would a 351 stroker be the better choice? The rearend is getting either 3.73s or 4.10s I was going to take it to the strip hoping to run under a 10. Would either of those be a good choice?

sn95_331_GT_ yellow

429CJ big block?

BB swap is a lot of work and youre going to ruin handling, shock towers, and be limited in trans choices.

a 351W swap is a good idea, it adds about 100 lbs to the front, but you can offset it with removing the AC, power steering, and adding a tubular K member with a arms.
longtube headers will give you a bit of a pain, its either Bassani or a custom set.
youre going to need a cowl hood and a bunch of other supporting mods and other assorted BS, but all in all, its well worth the swap.

351W > 302




*unless its a DART 302 block :-)*

Holy_Joe

They actually make parts to build a CJ on a small block. I know it sounds strange.

sn95_331_GT_ yellow

then youre talking about a Cleavor engine. 351W or 302 with 351C style heads. the 429 SCJ had semi-hemi style heads as did the 351C.

Holy_Joe

I dont think it would be a cleavor. The 289,302, and 351 were cleavors. Im just trying to get some ideas as to what would be the better swap.

Holy_Joe

Thanks for the Information. I appreciate it.

92hatchLX

No the 289 and 302 are not cleveland motors. There is a 351C though.

sn95_331_GT_ yellow

221, 260, 289, 302, 351W are all in the same category, although only the 351W is a Windsor block. however, they all share a bunch of the same components: heads, cams, cranks, water pumps, timing covers, etc.

Cleveland style engines are 351C, 351M, 400M (and if you REALLY want to get technical, i guess the BOSS 302. it had C style heads, but its a 302 block. albeit with 4 bolt mains on caps 2,3,4. obviously the BOSS 351 was a cleveland).

big blocks range from the FE style engines (390, 427, 428) and the 460 style (429, 460). the 427 SOHC was a derivative of the FE style block, but had no lifter bores and a bunch of added/removed oil passages.