[matt167]

Originally Posted by Custom10

Nothing "wrong" with them it just cost me a fortune. It was in a 70 torino cobra and I knew it was worth the money but it set me back for a while.

yea, if I did rebuild it, I'd actually build a stroker. it's about $500 diffrence to go from a rebuild to a stroker and end up with new everything and more power

[Valkyrie5.7]

With as light as your car will probably end up being, it'd probably go pretty quick. There's some 283 powered rods that move pretty good, and you've got an extra 17 cubes on them. I've never built one but I'll take a stab in the dark and assume you could build one with an EFI head with a thinner gasket to raise compression into the lower 9:1 range, convert to a four barrell carb, run a header with a free flowing exhaust and a cam that makes peak power at about5k rpm and you'd probably have a strong runner with the right gearing.

That's at least where I'd start researching with my build. I'm pretty sure Tech rebuilt the 300 in his pickup and I thought I remember him saying something about making it a little hotter than stock, could be wrong.

[Valkyrie5.7]

For what it's worth (warning, caution and all that other jazz for this desktop dyno result)

I plugged in a 4.9L using some modest head flow data (124 cfm in/103 cfm ex at .500 lift) from the Stan Weiss chart. Using a 9.3:1 compression ratio, 1.75/1.5 valves, a 390cfm 4bbl and long tube header with a comp 252H in it it made 273hp at 5.5k and 270 ft lbs of torque at 4.5k, with a nice flat torque curve throughout.

Once again, I'll stress that this is in desktop dyno, and I believe the head numbers are probably really conservative. I don't think these numbers are out in left field. Definitely not a barn burner in anything that weighs more than 3,000lbs, or even comparable to a 460... but I think it's more than enough to have fun with in your ride.

[matt167]

yep. 250-270 is fairly easy to attain with them.

[ogre]

Originally Posted by matt167

Any insight on this practical hotrod engine?

you want practical? sbc.

less practical? any ford

[matt167]

Have a '72 350 sitting in the corner. needs a water pump, flex plate and a distributor. have everything else to put it togther,. have no transmission for it tho, and I have located a '81 TH400 at that yard, but it's got no condition listed. The engine is also pretty tired.

[chevy302builder18]

Originally Posted by matt167

Have a '72 350 sitting in the corner. needs a water pump, flex plate and a distributor. have everything else to put it togther,. have no transmission for it tho, and I have located a '81 TH400 at that yard, but it's got no condition listed. The engine is also pretty tired.

when did replacement waterpumps become out ragious in cost? No offense sbc water pump is like $15 plus the core, this is reconditioned, if you call around, Oriellys, nappa, autozone ect.. TH400s dont die, and if it did it had some whacked out big block infront of it (exageration) , and ran without trannyfluid. But not even once have i yet seen someone even come close to destroying one. Put a mild cam in, some good headers on, new intake and youd have a jumpy 300 horse 350, unless needs a rebuild.

[matt167]

the engine is tired. It had lost a cylinder in my dads '72 C10. compression was still within spec, but we didn't have the time to tear it apart so he got the cheap 260hp GMPP crate engine and we put that in. probably got a wiped lobe on the cam. Even so, the intake I have for it is an old Holley single plane, I can't remember the number ( it's in storage ), but it's rated for 3500+.RPM. The carb I have is a Carter comp series 750cfm, so this thing wouldn't run so good if I did put it togther