Need some Info ....

**heaviechevie** · 01-11-2009, 01:14 PM

My first question is I have a really good deal on a 383 stroker motor (needs valve guide seals on one cylinder) with resonable mileage and it hasn't been beat. A friend of mines uncle just bought a new stroker motor and put it in his 84 K10 and is willing to sell me the other motor at a fraction of what it costs. My question is at about 400 hp should I invest in a 350 or 400 trans (currently I have the 700r4 in mine) and what about a stahl converter? Also if I change the tranny do I need to lengthen my drive shaft and will my transfer case work on the other 2 trannys?

Second (I guess it's actually third) I did get my carb working semi correctly, I haven't had to many little problems but unlike most holley 1850-2 carbs mine has the choke fresh air inake hose drilled. Do I need to plug this or should a vacuum line be hooked up to somewhere else to it? The truck doesn't run to bad with it open but it does seem to get a rough idle (more of a surging that you can see with the alt. gauage bouncing below 12 v) but it def. has more power than before. Any sugestions on whether to plug, run a vacuum line somewhere or just let it open?

**retired** · 01-11-2009, 02:15 PM

Ok I think that your 383 probably isn't as worked as you think it is. It is probably more like 300hp. A nice performance built 700 4R is perfect for your set up. Secondly your carb is to big for that motor. But this is just my opinion.

**heaviechevie** · 01-11-2009, 02:32 PM

It's a zz383 crate motor (425hp, 449 ft-lbs torque). My current motor is just a 350 with some aftermarket parts but the carb I have on it is a Holley 1850-2 (4160 series, 600 cfm, vacuum secondaries) smaller than the Q-jet that it replaced. The 383 comes with an Edelbrock carb so the Holley isn't going to be used. I just need to have the current motor running decent till spring when I can have some nice days to do the swap. I also don't want to run into the same problem that I had when I put a performance 350 (had 300 hp) in a blazer that I had and blew the stock torque converter up.