thermus
+1y
Hey Jose,
I just did a full rebuild on mine and was doing TONS of reading about what these motors can handle...
The best bang for your buck would be a 265 grind cam from Delta Cam in Tacoma Washington. This is going to add some low and mid range power. (2366 Tacoma Avenue South Tacoma, WA 98402 (253) 572-2474)
Pull your head and do a port and polish on the intake and exhaust side. (Time consuming but worth it)
I bored my block 20 over for a little extra all around power (not on the cheap side but if you do decide to do this, Call Mike at Auburn Auto Machine. He does IMPECCABLE work and is very nice. 3211 C Street Northeast Auburn, WA 98002 (253) 735-5267)
Exhaust... Pacesetter header, cat-less. (Make sure you get the correct header though, there is a auto and manual tranny difference due to mounting. Manual header will take some customization to fit an Automatic truck because of the mounting of the tranny.)
The blocks will handle the boost since we have a factory 8.6:1 ratio HOWEVER, to due a blow through turbo setup, it is recommended to tear apart the carb and seal everything since most of them are not rated for above atmospheric pressure from the factory. (Call Weber and ask about this. Plus you have to change fuel pump and jetting at the minimum. More boost, more fuel)
Like other people have said, they are not race trucks but you can make em peppy.